I. ˈtwi-tər verb
Etymology: Middle English twiteren; akin to Old High German zwizzirōn to twitter
Date: 14th century
intransitive verb
1. : to utter successive chirping noises
2.
a. : to talk in a chattering fashion
b. : giggle , titter
3. : to tremble with agitation : flutter
transitive verb
1. : to utter in chirps or twitters
the robin twitter ed its morning song
2. : to shake rapidly back and forth : flutter
II. noun
Date: 1678
1. : a trembling agitation : quiver
2. : a small tremulous intermittent sound (as of birds)
3.
a. : a light chattering
b. : a light silly laugh : giggle
• twit·tery ˈtwi-tə-rē adjective