- 1854, Elias Darnell, Journal of the Campaign, page 74:
- Allen said, "If we were of an age, and on an equal footing, you would not give me the lie so often."
- 2001, Jacqueline Carey, Kushiel's Dart, ISBN 0312872380, page 73:
- When she turned to kiss Alcuin, they were of a height.
- (idiomatic, dialectal) Indicates a more or less habitual activity during the given part of the day.
- Of an evening, I like to play chess. i.e., On some evenings, I like to play chess.
- Of a morning, they would work in their garden. i.e., They generally worked in their garden in the morning.
The first sense functions as an adjective and is generally used with be. The second sense functions as an adverb.
The phrase of a can also occur naturally in a prepositional phrase using of (e.g., the shell of an egg).