one who twits, or reproaches; an upbraider.-to make a succession of small, tremulous, intermitted noises.-to make the sound of a half-suppressed laugh; to titter; to giggle.-to have a slight trembling of the nerves; to be excited or agitated.-to utter with a twitter.-the act of twittering; a small, tremulous, intermitted noise, as that made by a swallow.-a half-suppressed laugh; a fit of laughter partially restrained; a titter; a giggle.-a slight trembling or agitation of the nerves.