of an

Definitions

1. Having the same.
   dated
2. Indicates a more or less habitual activity during the given part of the day.
   dated, idiomatic

Examples

“The two main players were roughly of an age.”

“He and F were of an age and standing, the giants of the house, but F was the braver, and did us the good office of keeping him in order⟳.”

“Allen said, "If we were of an age, and on an equal footing, you would not give⟳ me the lie⟳ so often."”

“When she turned to kiss Alcuin, they were of a height.”

“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.”

CEFR level