1 to discuss something with someone, often to try to find a solution to a disagreement: --
2 to give a lecture on a subject: --
The next speaker will be talking about endangered insects.
3 a conversation between two people, often about a particular subject: --
4 to say words aloud, usually to give or exchange information; to speak: --
5 a conversation between two people, often about a particular subject; the act of talking: --
I had to have a talk to her about a complaint that was made about her work.
She was nervous about giving a talk to her colleagues, but she carried it off very well.
We need to have another talk about this - can we meet later this afternoon?
He gave a talk on the representation of women in 19th-century art.
He didn't talk about his exam results in case people thought he was boasting.