in music, a rapid alternation of a main note and one above it
a sound resembling a musical trill, e.g. one made by a bird; a warble
a rapid vibration of one speech organ against another, e.g. of the tip of the tongue against the ridge of flesh behind the front teeth, or of the uvula (fleshy projection at the back of the mouth) against the back of the tongue
a speech sound, esp
[Italian trillo, from trillare to trill, of imitative origin]