Trill – two adjacent notes that are played rapidly one after another a few times
To remember what trill means, use the following mnemonic:
The trilby (trill) went back and forth between the two notes a few times rapidly. They each wanted to wear the hat.
A trill is used in music as an ornament, adding an interesting sound to a possibly straight forward passage of music.
Example of trill in a sentence
I played a trill on the piano.
The trill in the soundtrack built suspense.
A trill must be played quickly.