What is the meaning of the word "talk"?

Definitions:

an exchange of ideas via conversation noun
- let's have more work and less talk around here
discussion noun
- (`talk about' is a less formal alternative for `discussion of')
divulge confidential information or secrets verb
- The gossipy coworkers love to talk.
exchange thoughts verb
- talk with
express in speech verb
- They talk a lot of nonsense.
idle gossip or rumor noun
- there has been talk about you lately
reveal information verb
- If you don't oblige me, I'll talk!
the act of giving a talk to an audience noun
- I attended an interesting talk on local history
to deliver a lecture or talk verb
- They will talk at Rutgers next week.
use language verb
- the baby talks already