jet

Everyday

1. noun: A jet is a fast aircraft with jet engines. tree →
2. noun: A jet is a strong, narrow stream of water, gas or air pushed out of a small hole. tree →
3. verb (informal): To jet off means to travel somewhere by plane. tree →
4. noun: Jet is a hard black stone used in jewellery; jet-black means very dark black. tree →

In the lessons

In science: jet engines push hot gas backwards so the plane moves forwards (action and reaction). In everyday life: a jet of water from a hose, jet lag after long flights. Phrases: jet plane, jet lag, jet engine, jet of water, jet off, jet-black, jet ski.

Examples

• The jet flew high above the clouds. tree →
• A jet of water shot out of the fountain. tree →
• We felt tired from jet lag after flying to Canada. tree →
• The film star jetted off to Paris. tree →
• The cat had jet-black fur. tree →
• Whales blow a jet of air and spray. tree →
• A jet can fly 900 kilometres an hour. tree →
• Colored lamps surrounded little lakes, in which were water-plants of colored metal, from whose flowers jets of water spurted up. tree →

Note

Countable for planes and streams. Past: jetted (double t). In maths: distance = speed × time; a jet at 900 km per hour goes 1,800 km in 2 hours.