ALLEGRO
allegro
(adjective) (of tempo) fast
allegro
(adverb) in a quick and lively tempo; “play this section allegro”
allegro
(noun) a musical composition or musical passage to be performed quickly in a brisk lively manner
allegro
(noun) a brisk and lively tempo
Source: WordNet® 3.1
Etymology
Noun
allegro (plural allegros)
(music) A tempo mark directing that a passage is to be played in a quick, lively tempo, faster than allegretto but slower than presto
(music) In more traditional use, an expressive marking indicating lively or happily, not necessarily quick or fast.
(music) A passage having this mark
Adverb
allegro (not comparable)
(music) played in a quick, lively tempo
Adjective
allegro (not comparable)
(music) in a quick and lively manner
Source: Wiktionary
Al*le"gro, a. Etym: [It., merry, gay, fr. L. alacer lively. Cf.
Aleger.] (Mus.)
Definition: Brisk, lively.
– n.
Definition: An allegro movement; a quick, sprightly strain or piece.
Source: Webster’s Unabridged Dictionary 1913 Edition