era

Everyday

1. An era is a long period of history with special features or events, like the Victorian era. tree →
2. (science) In geology, an era is a very long period of Earth's history, like the Mesozoic Era when dinosaurs lived. tree →
3. An era is any period marked by something new, as in «the era of smartphones». tree →

In the lessons

In history lessons (Victorian era, Tudor era), science (geological eras, dinosaurs), everyday talk («the end of an era»); phrases: a new era, end of an era, the modern era.

Examples

• Queen Victoria gave her name to the Victorian era. tree →
• Dinosaurs lived in the Mesozoic Era. tree →
• The internet started a new era. tree →
• When our head teacher retired, it was the end of an era. tree →
• Steam trains were common in that era. tree →
• A new era seemed to have arisen in the poor studio. tree →

Note

Countable. Uses «an era». Different words for time: an era is long; a decade is 10 years; a century is 100 years. CE and BCE are «Common Era» and «Before Common Era».

In Jewish tradition

In history lessons (Victorian era, Tudor era), science (geological eras, dinosaurs), everyday talk («the end of an era»); phrases: a new era, end of an era, the modern era.

Examples

• Hence this book was known already in the second or at the beginning of the third century of the Christian Era. (Sefer Yetzirah, Kalisch 1877) tree →
• We are, however, now certain that in Babylon, many centuries before the Christian Era. a sexagesimal position was known. (Mordell, The Origin of Letters and Numerals according to Sefer Yetzirah (1914)) tree →
• Some of them believe it to be a production of the first or the second century R. 0. ; others place it in the Geonic period, ranging from the seventh to the ninth centuries of the Christian Era. (Mordell, The Origin of Letters and Numerals according to Sefer Yetzirah (1914)) tree →

Note

Countable. Uses «an era». Different words for time: an era is long; a decade is 10 years; a century is 100 years. CE and BCE are «Common Era» and «Before Common Era».