noun

1. A rapid alternation between an indicated note and the one above it, in musical notation usually indicated with the letters tr written above the staff.

2. A type of consonantal sound that is produced by vibrations of the tongue against the place of articulation: for example, Spanish rr.

3. A tremulous high-pitched vocal sound produced by cats.

verb

1. To create a trill sound; to utter trills or a trill; to play or sing in tremulous vibrations of sound; to have a trembling sound; to quaver.

2. To impart the quality of a trill to; to utter as, or with, a trill.

   “to trill a note, or the letter r”

Synonyms: roll