allegro

noun

1. A tempo mark directing that a passage is to be played in a quick, lively tempo, faster than allegretto but slower than presto.
2. An expressive mark indicating that a passage is to be played in a lively or happy manner, not necessarily quickly.
3. A passage having this mark.

   “And what mean these outbursts and objurgations of his, you will ask; these suggestions, furtive, rhapsodical, mystical; this furibund allegro about Money, Mediums, and Bohemia; [...]”

adv

1. (not-comparable)played in a quick, lively tempo

adj

1. (not-comparable)in a quick and lively manner