SAY [I] › to say things to someone: We were just talking about Simon's new girlfriend. The teacher's always telling him to stop talking. It was nice talking to you.US It was nice talking with you. DISCUSS [I] › to discuss something with someone, often to try to find a solution to a disagreement: The two sides have agreed to talk.
talk about sth/doing sth › to think about or make plans to do something in the future: They're talking about building a new fire station just up the road.
talk business/politics, etc › to discuss a particular subject: I don't like to talk business over lunch.
talking of sth UK (US speaking of sth) › used when you are going to start talking about something that is related to what has just been said: Talking of holidays, did you hear about Lesley's skiing trip? → See also speak/talk of the devil