What does the word trill mean?

Usage examples for trill

  1. I learned my trill this way. – In the Courts of Memory 1858-1875. by L. de Hegermann-Lindencrone
  2. A low, pleasant laugh, like the soft trill of a muffled music box, greeted my statement. – Cupid's Middleman by Edward B. Lent
  3. Her voice, it almost seemed, carried on the trill and music of the lark. – The Promise of Air by Algernon Blackwood
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