Verb

1. To be engaged in informal conversation.
2. To talk more than a few words.
3. To converse on a talk show.
4. To exchange text or voice messages in real time through a computer network, as if having a face-to-face conversation.

Noun

1. Informal conversation.
2. A conversation to stop an argument or settle situations.
3. An exchange of text or voice messages in real time through a computer network, resembling a face-to-face conversation.
4. A conversation on a talk show.
5. Any of various small Old World passerine birds in the subfamily Saxicolini that feed on insects.
6. A louse.

Noun

1. Mining waste from lead and zinc mines.
   • 2006, Thomas Pynchon, Against the Day, Vintage 2007, p. 441:

     Frank had been looking at calcite crystals for a while now [...] among the chats or zinc tailings of the Lake County mines, down here in the silver lodes of the Vita Madre and so forth.