allegro

adjective, adverb

1. brisk or rapid in tempo.

noun, plural al·le·gros.

2. an allegro movement.

noun

1. L’Allegro.

adjective, adverb

1. (to be performed) quickly, in a brisk lively manner

noun plural -gros

2. a piece or passage to be performed in this manner

1680s as a musical term, from Italian allegro “cheerful, gay,” from Latin alacrem (nominative alacer) “lively, cheerful, brisk” (see alacrity).

A brisk, lively musical tempo. Allegro is Italian for “cheerful.”