'Tremolo' definitions:

Definition of 'tremolo'

From: WordNet
noun
(music) a tremulous effect produced by rapid repetition of a single tone or rapid alternation of two tones
noun
Vocal vibrato especially an excessive or poorly controlled one

Definition of 'Tremolo'

From: GCIDE
  • Tremolo \Tre"mo*lo\, n. [It. Cf. Tremulous.] (Mus.) (a) The rapid reiteration of tones without any apparent cessation, so as to produce a tremulous effect. (b) A certain contrivance in an organ, which causes the notes to sound with rapid pulses or beats, producing a tremulous effect; -- called also tremolant, and tremulant. [1913 Webster]

Synonyms of 'tremolo'

From: Moby Thesaurus