(idiomatic) able to talk with someone, either in general or about the particular topic
They weren't on talking terms last time we saw them.
It is more professional to accept differences, no matter what the grievance, and walk away on talking terms.
We are on talking terms with him about his business.
(idiomatic, figuratively) in agreement or harmony with (something)
Reality and I were simply not on talking terms.
(rare) Used other than figuratively or idiomatically: see on, talking, terms.
After completing the last lesson, the student should be on “talking terms” with anyone who discusses the subject of algebra.