Any vocalisation of a bird.
An imitation of this cry.
A device used to imitate this cry, so as to lure and catch birds.
To imitate the cry of a bird.
The sound of a bird; any short high-pitched sound or whistle.
An entry posted on the microblogging service Twitter.
The sound of a bird twittering.
To make a short high-pitched sound, like that of certain birds.
To post an update to Twitter.