allegro allegretto • allele · · · Info · Definitions · Characters · · allegro · · Text Latin · · Script 7 · · Length Definitions · · · (noun) a brisk and lively tempo. · · Noun Definition 1 (noun) a musical composition or musical passage to be performed quickly in a brisk lively manner. · · Noun Definition 2 (adj) (of tempo) fast. · · Adjective Definition 1 (adv) in a quick and lively tempo. Example: "Play this section allegro." · · Adverb Definition 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 g latin small letter g U+0067 l latin small letter l U+006C o latin small letter o U+006F r latin small letter r U+0072