Available Definitions:
1) n. - One who twits, or reproaches; an upbraider.
2) v. i. - To make a succession of small, tremulous, intermitted noises.
3) v. i. - To make the sound of a half-suppressed laugh; to titter; to giggle.
4) v. i. - To have a slight trembling of the nerves; to be excited or agitated.
5) v. t. - To utter with a twitter.
6) n. - The act of twittering; a small, tremulous, intermitted noise, as that made by a swallow.
7) n. - A half-suppressed laugh; a fit of laughter partially restrained; a titter; a giggle.
8) n. - A slight trembling or agitation of the nerves.