The Collaborative International Dictionary of English v.0.48:

Viola \Vi"o*la\, n. [L., a violet. See Violet.] (Bot.)
   A genus of polypetalous herbaceous plants, including all
   kinds of violets.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Viola \Vi"o*la\, n. [It. See Viol.] (Mus.)
   An instrument in form and use resembling the violin, but
   larger, and a fifth lower in compass.
   [1913 Webster]

   Viola da braccio [It., viol for the arm], the tenor viol,
      or viola, a fifth lower than the violin. Its part is
      written in the alto clef, hence it is sometimes called the
      alto.

   Viola da gamba [It., viol for the leg], an instrument
      resembling the viola, but larger, and held between the
      knees. It is now rarely used.

   Viola da spalla [It., viol for the shoulder], an instrument
      formerly used, resembling the viola, and intermediate in
      size between the viola and the viola da gamba.

   Viola di amore [It., viol of love: cf. F. viole d'amour], a
      viol, larger than the viola, having catgut strings upon,
      and brass or steel wires under, the keyboard. These,
      sounding sympathetically with the strings, yield a
      peculiarly soft and silvery sound. It is now seldom used.
      [1913 Webster]

WordNet (r) 3.0 (2006):

viola
    n 1: any of the numerous plants of the genus Viola
    2: large genus of flowering herbs of temperate regions [syn:
       Viola, genus Viola]
    3: a bowed stringed instrument slightly larger than a violin,
       tuned a fifth lower

The Free On-line Dictionary of Computing (19 January 2023):

Viola

   An experimental hypercard-like interpreted hypertext
   system by Pei Y. Wei of Berkeley.

   (1994-11-30)