WordReference Random House Learner's Dictionary of American English © 2014
trill1 /trɪl/USA pronunciation  n. [countable]
  1. a rapid alternation between two nearby musical tones.
  2. a similar quavering sound, as that made by a bird or by a person laughing.

v. 
  1. to sing, make, pronounce, or play with a trill: [+ object]to trill a few notes.[no object]birds trilling in the morning.


Collins Concise English Dictionary © HarperCollins Publishers::

trill /trɪl/ n
  1. a melodic ornament consisting of a rapid alternation between a principal note and the note a whole tone or semitone above it
  2. a shrill warbling sound, esp as made by some birds
  3. the production of a similar effect using the uvula against the back of the tongue
vb
  1. to sound, sing, or play (a trill or with a trill)
  2. (transitive) to pronounce (an (r) sound) by the production of a trill
Etymology: 17th Century: from Italian trillo, from trillare, apparently from Middle Dutch trillen to vibrate



'trill' also found in these entries:
In the English description:

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