music 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.
phonetics A type of consonantal sound that is produced by vibrations of the tongue against the place of articulation, for example, Spanish rr.
intransitive 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.
Dryden
To judge of trilling notes and tripping feet.
transitive To impart the quality of a trill to; to utter as, or with, a trill.
I come now from seeing of a shepheard at Medoc[…]who had no signe at all of genitorie parts: But where they should be, are three little holes, by which his water doth continually tril from him.
Shakespeare
And now and then an ample tear trilled down / Her delicate cheek.
Glover
Whispered sounds / Of waters, trilling from the riven stone.
