English words: O

453 words under O; 201–300 on this page.

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• oppressive adjective (oppressive, more oppressive, most oppressive)
  Cruel and unfair, keeping people down and taking away their freedom: an oppressive ruler.
• oppressor nounJewish tradition
  A person who treats others cruelly and unfairly and uses power to keep them down.
• opprobrium nounJewish tradition
  Public shame or disgrace, bad name.
• optic adjective (optic); noun (an optic, optics)
  To do with the eye or sight: «the optic nerve».
• optical adjective (optical); adverb (optically)everyday · Jewish tradition
  To do with seeing and the eyes.
• optician noun (an optician, opticians)
  An optician is a person whose job is to test people's eyes and make or sell glasses and contact lenses.
• optimistic adjective (optimistic, more optimistic, most optimistic)
  Hopeful and believing good things will happen.
• option noun (an option, options); verb…
  One of the things you can choose from.
• optional adjective (optional)
  Something you can choose to do or have, but you do not have to.
• optometrist noun (an optometrist, optometrists)
  An optometrist is a person trained to test people's eyesight, check eye health and prescribe glasses or contact lenses.
• opus nounJewish tradition
  A Latin word meaning a work, especially a piece of writing or music.
• or conjunctioneveryday · Jewish tradition
  Or gives a choice between two or more things: tea or juice?
• oracle noun (an oracle, oracles)everyday · Jewish tradition
  In ancient Greece and Rome, a priest or priestess through whom people believed the gods gave advice or told the future, or the holy place…
• oracular adjective
  Oracular means like an oracle: giving wise-sounding answers or predictions that are often hard to understand.
• oral adjective (oral); noun (an oral, orals — an oral exam, UK)
  Oral means spoken, not written: an oral test or an oral report is done by talking.
• orally adverb (orally)
  By speaking, not in writing, as in "answer orally".
• orang noun (an orang, orangs); also a word in Malay
  Short for orangutan, the large red-haired ape of Borneo and Sumatra.
• orange noun (orange, oranges); adjective (orange)
  An orange is a round, juicy fruit with a thick skin; it grows on a tree.
• orangutan noun (an orangutan, orangutans)
  An orangutan is a large, intelligent ape with long reddish-orange hair and very long arms, which lives in the rainforests of Borneo and…
• oration noun (orations)
  An oration is a formal speech, often given at a special ceremony such as a funeral.
• orator noun (orators)
  An orator is a person who is skilled at making speeches in public.
• oratory noun (oratory — uncountable; an oratory, oratories)
  The skill of giving powerful, good speeches in public.
• orb noun (an orb, orbs)everyday · Jewish tradition
  An orb is a ball or round object, especially one that glows.
• orbit noun (an orbit, orbits); verb…everyday · Jewish tradition
  An orbit is the curved path of a planet, moon or satellite going around a star or planet.
• orbital adjective (orbital); noun (an orbital, orbitals)
  Orbital means to do with an orbit, the path of something going round a planet, star or moon.
• orca noun (an orca, orcas)
  An orca, also called a killer whale, is a large black-and-white sea mammal with a tall back fin; it is actually the biggest member of the…
• orchard noun (orchard, orchards)
  An orchard is a piece of land with many fruit trees, like apple, pear, cherry or orange trees, often planted in rows.
• orchestra noun (an orchestra, orchestras)
  An orchestra is a large group of musicians who play many instruments together, such as violins, flutes, trumpets and drums.
• orchestral adjective (orchestral)
  To do with an orchestra or written for an orchestra, a large group of musicians playing strings, woodwind, brass and percussion together.
• orchid noun (orchid, orchids)
  An orchid is a beautiful flower with petals of unusual shapes; there are many thousands of kinds.
• ordain verb (ordain, ordains, ordained, ordaining)everyday · Jewish tradition
  To ordain someone is to make them a priest, minister or rabbi in a special religious ceremony.
• ordained verb past form (ordain, ordains, ordained, ordaining)…everyday · Jewish tradition
  Ordained means made a priest, minister or religious leader in a special ceremony.
• ordeal noun (an ordeal, ordeals)
  A very hard, painful or frightening experience that goes on for some time.
• order noun (order, orders); verb…everyday · Jewish tradition
  Order is the way things follow one after another: in alphabetical order, in order of size.
• ordering nounJewish tradition
  The way things are put in order; arranging or arrangement.
• orderly adjective (orderly); noun (an orderly, orderlies)
  Orderly means tidy and well arranged: an orderly desk.
• ordinal adjective (ordinal); noun (an ordinal, ordinals)
  An ordinal number shows the place or position of something in order: first, second, third, fourth and so on.
• ordinance nounJewish tradition
  A rule or law that must be kept, especially one given by an authority.
• ordinarily adverb (ordinarily)
  Usually; in the normal way: Ordinarily, I walk to school.
• ordinary adjective; noun (out of the ordinary)everyday · Jewish tradition
  Ordinary means normal, usual or plain; not special or different.
• ordinate noun (an ordinate, ordinates)
  The y-coordinate of a point on a graph: how far up or down the point is from the x-axis.
• ordination noun (ordination, ordinations)
  Ordination is the ceremony in which a person is made a priest, minister, deacon or rabbi, usually by a bishop or other leader.
• ordnance noun (ordnance, uncountable)
  Military weapons, especially large guns, bombs, shells and ammunition.
• ore noun (ore, ores)everyday · Jewish tradition
  Ore is rock or earth that has a useful metal in it, like iron or copper, which people dig up and take the metal out of.
• organ noun (an organ, organs)everyday · Jewish tradition
  A part of the body that has a special job, like the heart, lungs, brain, stomach or skin.
• organic adjective (organic; organically — adverb)
  Organic food is grown or raised without man-made chemicals such as artificial pesticides and fertilisers.
• organisation noun…
  An organisation is a group of people who work together for a purpose, such as a charity, club, company or school.
• organise verb…
  To organise something is to plan and arrange it: organise a party, a trip or a game.
• organised adjective (organised, more organised, most organised); also…
  Organised means tidy and well planned, so things are where they should be and done on time.
• organiser noun (an organiser, organisers; US organizer)
  A person who plans and arranges an event or activity, like a party, a trip or a sports day.
• organism noun (an organism, organisms)
  Any living thing, such as an animal, plant, fungus or bacterium.
• organization noun…
  A group of people who work together for a purpose, such as a charity, a club, a company or a school.
• organize verbJewish tradition
  To arrange things in a neat and sensible order.
• organized verb past and past participle…
  Organized means put in a neat order, or sorted into groups.
• orient verb (orient, orients, oriented, orienting); noun…everyday · Jewish tradition
  To find out or work out where you are or which way you are facing, as in "orient yourself with a map".
• oriental adjective (oriental; Oriental); noun…everyday · Jewish tradition
  From or to do with the countries of East Asia, like China, Japan and Korea.
• orientation noun (orientation, orientations; an orientation)
  The direction something faces or points: north, south, up, sideways.
• oriented adjective (oriented, -oriented); verb past form…
  Oriented means pointed or turned in a certain direction.
• orifice nounJewish tradition
  An opening in the body, such as the mouth, nose or ears.
• origami noun (origami — uncountable)
  The Japanese art of folding paper into shapes like birds, animals and boxes, usually without cutting or glue.
• origin noun (an origin, origins)everyday · Jewish tradition
  The origin of something is where or how it began.
• original adjective (original); noun (an original, originals)everyday · Jewish tradition
  First; existing at the beginning, before changes: «the original plan».
• originality noun (no plural)everyday · Jewish tradition
  Originality is being new and different, not copied from others.
• originally adverb (from «original»)everyday · Jewish tradition
  At first; in the beginning, before something changed.
• originate verb (originate, originates, originated, originating)everyday · Jewish tradition
  To begin or come from a place, time or source (the game originated in Scotland).
• originator noun (an originator, originators)everyday · Jewish tradition
  The originator of something is the person who first thought of it, made it or started it.
• ornament noun (an ornament, ornaments); verb…everyday · Jewish tradition
  An ornament is a small object used to make a room, a shelf or a Christmas tree look nice, rather than for a practical use.
• ornamental adjective (ornamental)
  Ornamental means used to decorate and make something look nice, rather than for a practical use.
• orphan noun (an orphan, orphans); verb…everyday · Jewish tradition
  An orphan is a child whose parents have both died.
• orphanage noun (orphanages)
  An orphanage is a home where children who have no parents live and are cared for.
• orthodontist noun (an orthodontist, orthodontists)
  A dentist who specialises in straightening teeth and fixing the way teeth and jaws fit together, often by fitting braces.
• orthodox adjective (orthodox, more orthodox); Orthodox…everyday · Jewish tradition
  Orthodox means following the usual, accepted ideas or ways of doing something.
• orthography noun (orthography; orthographies)everyday · Jewish tradition
  Orthography is the system of spelling and writing a language: which letters stand for which sounds, and rules for capital letters, hyphens…
• orthoptist noun (an orthoptist, orthoptists)
  A health professional who checks and treats problems with how the eyes move and work together, such as a squint or a lazy eye.
• oryx noun (an oryx, oryx or oryxes)
  An oryx is a large antelope of the deserts and dry grasslands of Africa and Arabia, with very long, straight, pointed horns and a pale…
• os noun (os, ossa — Latin); abbreviation (OS); fragmenteveryday · Jewish tradition
  OS is short for "operating system", the main program that runs a computer or phone, like Windows, macOS, Android or iOS.
• oscar noun, name (an Oscar, Oscars; Oscar — a boy's name)
  An Oscar is a gold statue given each year as a top prize for films, also called an Academy Award.
• oscillate verb (oscillate, oscillates, oscillated, oscillating)
  To swing or move back and forth regularly, like a pendulum.
• oscillating verb form…everyday · Jewish tradition
  Swinging or moving back and forth regularly.
• oscillation noun (an oscillation, oscillations; also uncountable)
  A regular movement back and forth, like a pendulum swing.
• osier noun (an osier, osiers)
  A kind of willow tree or bush that grows by rivers and wet ground, with long thin bendy shoots.
• osprey noun (an osprey, ospreys)
  An osprey is a large bird of prey with brown wings and a white underside that dives feet-first into water to catch fish.
• ossified adjective (ossified); also the past form of the verb ossify…
  Ossified means turned into bone: soft cartilage that has hardened into bone, as happens in a growing child's skeleton.
• ostentation noun (no plural)
  Ostentation is showing off to be noticed, with too much display of wealth or fine things.
• ostler noun (ostlers)
  An ostler is a man who looked after horses at an inn in the old days.
• ostracise verb (ostracise, ostracises, ostracised, ostracising)
  To leave someone out of a group on purpose and refuse to talk to them or include them.
• ostracism noun (ostracism, uncountable)
  Leaving someone out on purpose, so they are not included by a group.
• ostrich noun (ostrich, ostriches)everyday · Jewish tradition
  An ostrich is a very large bird from Africa that cannot fly but runs very fast on its long, strong legs.
• other adjective (other); pronoun (other, others); determiner…everyday · Jewish tradition
  Other means a different one, not this one.
• otherwise adverb (otherwise); also a joining word (= or else)everyday · Jewish tradition
  Otherwise means «if not» or «or else»: what will happen if something is not done.
• otoscope noun (an otoscope, otoscopes)
  An otoscope is a small medical tool with a light and a magnifying lens that a doctor uses to look inside your ear.
• ottawa noun, proper (Ottawa — with a capital letter)
  Ottawa: the capital city of Canada, in the province of Ontario, on the Ottawa River.
• otter noun (otter, otters)
  An otter is a playful animal with smooth brown fur, short legs, webbed feet and a long tail that lives near rivers or the sea and swims…
• ottoman noun (an ottoman, ottomans — furniture; the Ottomans)…
  The Ottoman Empire was a large, long-lasting empire ruled by Turkish sultans from Istanbul, covering Turkey and lands in south-east…
• ought verb (old noun sense: anything, from "aught")
  Should, or was right to; the old noun sense (anything) is no longer used.
• ounce noun (ounces)
  An ounce is a small unit of weight; there are 16 ounces in a pound, and an ounce is about 28 grams.
• ousel noun (ousel, ousels) (old use)
  An ousel is an old word for a dark bird of the thrush family, such as a blackbird.
• oust verb (oust, ousts, ousted, ousting)
  To oust someone is to force them out of a place, job or position so that they lose it.
• out adverb, preposition (out; out of); adjective (out); verb…everyday · Jewish tradition
  Out means away from the inside of something.
• outback noun (the outback)
  The outback is the huge, dry, mostly empty land far inland in Australia, far away from the cities and the coast.

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