1. (

• trill ,
• shake ,

) a note that alternates rapidly with another note a semitone above it ;

2. (

• trill ,

) 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" ;

1. (

• trill ,

) pronounce with a trill, of the phoneme `r'; "Some speakers trill their r's" ;

2. (

• warble ,
• trill ,
• quaver

) sing or play with trills, alternating with the half note above or below ;