From Italian allegro.
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
- (music) played in a quick, lively tempo
- (music) describing a passage having this mark
From Italian allegro
allegro m (plural allegros)
From Latin alacer (“lively; happy, cheerful”).