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