'Presto' definitions:

Definition of 'presto'

(from WordNet)
adverb
Suddenly; "Presto! begone! 'tis here again"- Swift
adverb
At a very fast tempo (faster than allegro)
adjective
(of tempo) very fast

Definition of 'Presto'

From: GCIDE
  • Presto \Pres"to\, adv. [It. or Sp. presto quick, quickly. See Prest, a.]
  • 1. Quickly; immediately; in haste; suddenly. [1913 Webster]
  • Presto! begone! 'tis here again. --Swift. [1913 Webster]
  • 2. (Mus.) Quickly; rapidly; -- a direction for a quick, lively movement or performance; quicker than allegro, or any rate of time except prestissimo. [1913 Webster]

Synonyms of 'presto'

From: Moby Thesaurus