to flow in a small stream, or in drops rapidly succeeding each other; to trickle.-to turn round; to twirl.-to impart the quality of a trill to; to utter as, or with, a trill; as, to trill the r; to trill a note.-to utter trills or a trill; to play or sing in tremulous vibrations of sound; to have a trembling sound; to quaver.-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; as, the r is a trill in most languages.-the action of the organs in producing such sounds; as, to give a trill to the tongue. d-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; as, to give a trill on the high c. see shake.