ˈkweɪvə(ɹ) ˈkweɪvə(ɹ) tɹɪl ˈweɪ.və(ɹ) ˈweɪ.vɚ sing or play with trills, alternating with the half note above or below give off unsteady sounds, alternating in amplitude or frequency a musical note having the time value of an eighth of a whole note a tremulous sound