Meaning of trill

Definition of trill

(noun) a note that alternates rapidly with another note a semitone above it
the articulation of a consonant (especially the consonant `r') with a rapid flutter of the tongue against the palate or uvula; "he pronounced his R's with a distinct trill"
(verb) pronounce with a trill, of the phoneme `r'; "Some speakers trill their r's"
sing or play with trills, alternating with the half note above or below

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