A conversation or discussion; usually serious, but informal.

A lecture.

(uncountable) Gossip; rumour.

(preceded by the; often qualified by a following of) A major topic of social discussion.

(preceded by the) A noun "talk" represents a customary conversation by parent(s) or guardian(s) with their child, often about sexual intercourse or the racism and violence faced by black children.

(uncountable, not preceded by an article) Empty boasting, promises or claims.

(usually in the plural) Meeting to discuss a particular matter.

(intransitive) To communicate, usually by means of speech.

(transitive, informal) To discuss; to talk about.

(transitive) To speak (a certain language).

(transitive, informal, chiefly used in progressive tenses) Used to emphasise the importance, size, complexity etc. of the thing mentioned.

(intransitive, slang) To confess, especially implicating others.

(intransitive) To criticize someone for something of which one is guilty oneself.

(intransitive) To gossip; to create scandal.

(informal, chiefly used in progressive tenses) To influence someone to express something, especially a particular stance or viewpoint or in a particular manner.