Real Dictionary

talk
If you talk a particular language or talk with a particular accent, you use that language or have that accent when you speak.
If you talk something such as politics or sport, you discuss it.
You can say that you are talking a particular thing to draw attention to your topic or to point out a characteristic of what you are discussing.
plural noun: Talks are formal discussions intended to produce an agreement, usually between different countries or between employers and employees.
uncountable noun: If you say that something such as an idea or threat is just talk, or all talk, you mean that it does not mean or matter much, because people are exaggerating about it or do not really intend to do anything about it.
verb: If one group of people talks to another, or if two groups talk, they have formal discussions in order to do a deal or produce an agreement.
verb: If people are talking about another person or are talking, they are discussing that person.
verb: If someone talks when they are being held by police or soldiers, they reveal important or secret information, usually unwillingly.
verb: If you talk on or about something, you make an informal speech telling people what you know or think about it.
verb: If you talk to someone, you have a conversation with them. You can also say that two people talk.
verb: If you talk to someone, you tell them about the things that are worrying you. You can also say that two people talk.
verb: When different countries or different sides in a dispute talk, or talk to each other, they discuss their differences in order to try and settle the dispute.
verb: When you talk, you use spoken language to express your thoughts, ideas, or feelings.
verb: You can use talk to say what you think of the ideas that someone is expressing. For example, if you say that someone is talking sense, you mean that you think the opinions they are expressing are sensible.

talk in American English
to put ideas into, or exchange ideas by, spoken words; speak; converse
intransitive verb: to communicate or exchange ideas, information, etc., by speaking
transitive verb: to express in words; utter

talk in British English
verb: to express one's thoughts, feelings, or desires by means of words (to); speak (to)