"trill" in the noun sense
1. trill, shake
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"
"trill" in the verb sense
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
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License