Question 1

What does "keep at arm's length" mean?

Accepted Answer

To avoid becoming too close or involved with someone or something.

Question 2

How do you use "keep at arm's length" in a sentence?

Accepted Answer

She kept her new colleague at arm's length until she could trust him.

Question 3

Is "keep at arm's length" formal or informal?

Accepted Answer

"keep at arm's length" is register-neutral — appropriate in both casual and formal contexts. Can refer to emotional, professional, or physical distance.