atwitter

v. i. [ imp. & p. p. Twittered p. pr. & vb. n. Twittering. ] [ OE. twiteren; of imitative origin; cf. G. zwitschern, OHG. zwizzirōn, D. kwetteren, Sw. qvittra, Dan. quiddre. Cf. Titter. ] 1. To make a succession of small, tremulous, intermitted noises. [ 1913 Webster ]

The swallow twittering from the straw-built shed. Gray. [ 1913 Webster ]

2. To make the sound of a half-suppressed laugh; to titter; to giggle. J. Fletcher. [ 1913 Webster ]

3. [ Perhaps influenced by twitch. ] To have a slight trembling of the nerves; to be excited or agitated. [ 1913 Webster ]

v. t. To utter with a twitter. Cowper. [ 1913 Webster ]

n. 1. The act of twittering; a small, tremulous, intermitted noise, as that made by a swallow. [ 1913 Webster ]

2. A half-suppressed laugh; a fit of laughter partially restrained; a titter; a giggle. Hudibras. [ 1913 Webster ]

3. A slight trembling or agitation of the nerves. [ 1913 Webster ]