Question 1

What does "a bone of contention" mean?

Accepted Answer

A subject or issue that causes ongoing disagreement or argument.

Question 2

How do you use "a bone of contention" in a sentence?

Accepted Answer

The border demarcation has been a bone of contention between the two nations for decades.

Question 3

Is "a bone of contention" formal or informal?

Accepted Answer

"a bone of contention" is register-neutral — appropriate in both casual and formal contexts. Often used in formal discussions, politics, or longstanding disputes between parties.