trilling Definition

trill
noun

1. music.
A sound that is produced by repeatedly playing or singing a note and a note above in rapid succession.
2. A warbling sound made by a songbird.
3. A consonant sound, especially an ‘r' sound, that is made by rapidly vibrating the tongue.

verb

tr & intr
trilled, trilling
1. To play, sing, pronounce, etc something with a trill.

Thesaurus: warble, tweet, chirp, sing, whistle, twitter.

Etymology: 17c: from Italian trillare to quaver or warble.