Warble

1. (n.) A small, hard tumor which is produced on the back of a horse by the heat or pressure of the saddle in traveling.
2. (n.) A small tumor produced by the larvae of the gadfly in the backs of horses, cattle, etc. Called also warblet, warbeetle, warnles.
3. (n.) See Wormil.
4. (v. t.) To sing in a trilling, quavering, or vibratory manner; to modulate with turns or variations; to trill; as, certain birds are remarkable for warbling their songs.
5. (v. t.) To utter musically; to modulate; to carol.
6. (v. t.) To cause to quaver or vibrate.
7. (v. i.) To be quavered or modulated; to be uttered melodiously.
8. (v. i.) To sing in a trilling manner, or with many turns and variations.
9. (v. i.) To sing with sudden changes from chest to head tones; to yodel.
10. (n.) A quavering modulation of the voice; a musical trill; a song.