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"
pronounce with a trill, of the phoneme `r'; "Some speakers trill their r's"
report or maintain; "He alleged that he was the victim of a crime"; "He said it was too late to intervene in the war"; "The registrar says that I owe the school money"