a period of time that is characterized by particular events, qualities, conditions, or individuals
The United States enjoyed a time of peace and prosperity during the Clinton era.

a reason given tin defence of some fault
He's always making excuses for being late.

to take place, often unexpectedly or by chance
When did the accident happen?

someone who studies or writes about the course of history
My father is a historian, and his specialty is East Asian history.

to find a piece of information by looking in a book or using a computer
People go to the museum to look up at his beautiful work.

to happen
Typhoons occur mainly in the western Pacific.

the state or quality of being the person who made something happen
It is my responsibility to pay for all the bills.

foolish, lacking good sense
People heard me and they didn’t realize I was being silly!

to say something in speech or writing, usually in a formal way
The teacher stated that the homework would be due next week.