chat1
v.
(chats, chatting, chatted)
talk in a friendly and informal way.
▸
(chat someone up)
informal engage someone in flirtatious conversation.
n.
an informal conversation.
Etymology
ME: shortening of chatter.
chat2
n.
used in names of various songbirds with harsh, chattering calls, e.g.
stonechat.
Etymology
C17: prob. imitative of their calls.