NOUN (2)

1. a brisk and lively tempo;

2. a musical composition or musical passage to be performed quickly in a brisk lively manner;


ADJECTIVE (1)

1. (of tempo) fast;


ADVERB (1)

1. in a quick and lively tempo;
- Example: "play this section allegro"

The Collaborative International Dictionary of English v.0.48:

Allegro \Al*le"gro\, a. [It., merry, gay, fr. L. alacer lively.
   Cf. Aleger.] (Mus.)
   Brisk, lively. -- n. An allegro movement; a quick, sprightly
   strain or piece.
   [1913 Webster]

WordNet (r) 3.0 (2006):

allegro
    adv 1: in a quick and lively tempo; "play this section allegro"
    adj 1: (of tempo) fast
    n 1: a brisk and lively tempo
    2: a musical composition or musical passage to be performed
       quickly in a brisk lively manner

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "allegro":
   accelerando, actively, adagietto, adagio, affrettando, all out,
   allegretto, andante, andantino, animatedly, breezily, briskly,
   con anima, con brio, crescendo, decrescendo, desto, diminuendo,
   energetically, forte, fortissimo, full tilt, in full swing,
   larghetto, larghissimo, largo, legato, lively, marcando, moderato,
   pianissimo, piano, pizzicato, prestissimo, presto, rallentando,
   ritardando, ritenuto, scherzando, scherzo, spiccato, spiritedly,
   sprightly, staccato, stretto, veloce, vivace, vivaciously,
   vivacissimo



The Free On-line Dictionary of Computing (30 December 2018):

Allegro

    The code name for the major Mac OS
   release due in mid-1998.


(http://devworld.apple.com/mkt/informed/appledirections/mar97/roadmap.html).

   (1997-10-15)