n.
1.a note that alternates rapidly with another note a semitone above it trill v.
1.pronounce with a trill, of the phoneme `r'
2.sing or play with trills, alternating with the half note above or below
Idiom of the Day
serve as a guinea pig
to allow some kind of test to be performed on someone
The students served as a guinea pig for the school board's plan to change the school curriculum.