trill

Noun

• 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
    

• a note that alternates rapidly with another note a semitone above it

Verb

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

• pronounce with a trill, of the phoneme `r'
  • Some speakers trill their r's
    

Related words

• Synonyms: 
  shake , warble , quaver