tweet(noun, verb) noun1. a weak chirping sound as of a small birdDefinition categories: event, chirp verb1. make a weak, chirping sound- the small bird was tweeting in the treeSimilar word(s): twirpDefinition categories: perception, go, sound2. squeeze tightly between the fingersSimilar word(s): nip, pinch, squeeze, twinge, twitchDefinition categories: contact, grip