ADJECTIVE (1)

1. (of tempo) very fast and lively;


ADVERB (1)

1. lively, in music;
- Example: "play this section vivace!"

The Collaborative International Dictionary of English v.0.48:

Vivace \Vi*va"ce\, a. & adv. [It.] (Mus.)
   Brisk; vivacious; with spirit; -- a direction to perform a
   passage in a brisk and lively manner.
   [1913 Webster]

WordNet (r) 3.0 (2006):

vivace
    adv 1: lively, in music; "play this section vivace!"
    adj 1: (of tempo) very fast and lively