trill

Short definition from Wiktionary

Noun

1. 1
   A rapid alternation between an indicated note and the one above it as an ornament; in musical notation usually indicated with the letters tr written above the staff.
2. 2
   A type of consonantal sound that is produced by vibrations of the tongue against the place of articulation: for example, Spanish ⟨rr⟩, /r/.
3. 3
   A tremulous high-pitched vocal sound produced by cats.

Verb

1. 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. 2
   To impart the quality of a trill to; to utter as, or with, a trill.
3. 3
   To trickle.
4. 4
   To twirl.

Adjective

1. 1
   True, respected.