verb-intransitive. To flow in a small stream, or in drops rapidly succeeding each other; to trickle.v. To turn round; to twirl.v. To impart the quality of a trill to; to utter as, or with, a trillverb-intransitive. To utter trills or a trill; to play or sing in tremulous vibrations of sound; to have a trembling sound; to quaver.n. A sound, of consonantal character, made with a rapid succession of partial or entire intermissions, by the vibration of some one part of the organs in the mouth -- tongue, uvula, epiglottis, or lip -- against another part.n. The action of the organs in producing such sounds. d.n. A shake or quaver of the voice in singing, or of the sound of an instrument, produced by the rapid alternation of two contiguous tones of the scale. See Shake.