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1. The rapid series of noises made by the parts of a machine
   - chatter
    
2. The high-pitched continuing noise made by animals (birds or monkeys)
   - chatter

1. Make a clicking sound repeatedly or uncontrollably
   "Chattering teeth";
   - click
    
2. Cut unevenly with a chattering tool
    
3. Talk socially without exchanging too much information
   "the men were sitting in the cafe and chattering";
   - chew the fat, shoot the breeze [N. Amer], chat, confabulate, confab, chitchat, chit-chat, chaffer, natter, gossip, jaw, claver [UK, dialect], visit, gas, gab
    
4. Speak (about unimportant matters) rapidly and incessantly
   - piffle, palaver, prate, tittle-tattle, twaddle, clack, maunder, prattle, blab, gibber, tattle, blabber, gabble, witter [Brit], rabbit [Brit], vapor [US], yatter [Brit], yabber [Brit]
    
5. Make noise as if chattering away
   "The magpies were chattering in the trees"

Derived forms: chatterings

Type of: converse, cut, discourse, go, mouth, noise, sound, speak, talk, utter, verbalise [Brit], verbalize

Encyclopedia: Chatter