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.

ME: shortening of chatter.

chat²

n.

used in names of various songbirds with harsh, chattering calls, e.g. stonechat.

C17: prob. imitative of their calls.

以上來源於：《簡明牛津英語詞典》