(1):

(v. i.) To sing with sudden changes from chest to head tones; to yodel.

(2):

(v. i.) To be quavered or modulated; to be uttered melodiously.

(3):

(n.) A small, hard tumor which is produced on the back of a horse by the heat or pressure of the saddle in traveling.

(4):

(v. t.) To cause to quaver or vibrate.

(5):

(n.) A small tumor produced by the larvae of the gadfly in the backs of horses, cattle, etc. Called also warblet, warbeetle, warnles.

(6):

(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.

(7):

(n.) A quavering modulation of the voice; a musical trill; a song.

(8):

(v. i.) To sing in a trilling manner, or with many turns and variations.

(9):

(n.) See Wormil.

(10):

(v. t.) To utter musically; to modulate; to carol.