Noah Webster
TWIT'TER, verb transitive
1. To make a succession of small, tremulous, intermitted noises; as, the swallow twitters.
2. To make the sound of a half suppressed laugh.
TWIT'TER, noun [from twit.] One who twits or reproaches.
TWIT'TER, noun A small intermitted noise, as in half suppressed laughter; or the sound of a swallow.