Dictionary.net

suddenly; "Presto! begone! 'tis here again"- Swift

suddenly; "Presto! begone! 'tis here again"- Swift

(music) at a very fast tempo (faster than allegro)

Quickly; immediately; in haste; suddenly.

Quickly; rapidly; -- a direction for a quick, lively movement or performance; quicker than allegro, or any rate of time except prestissimo.

Quickly; suddenly: used as a musical direction.

In quick time.

At once; instantly; suddenly. - presto! change! pass quickly; a juggler's formula.

In music, a term denoting quick time; used among jugglers as a word of command for sudden changes; at hand; at once; quick.