The Collaborative International Dictionary of English v.0.48:

Still \Still\, a. [Compar. Stiller; superl. Stillest.] [OE.
   stille, AS. stille; akin to D. stil, OS. & OHG. stilli, G.
   still, Dan. stille, Sw. stilla, and to E. stall; from the
   idea of coming to a stand, or halt. Cf. Still, adv.]
   1. Motionless; at rest; quiet; as, to stand still; to lie or
      sit still. "Still as any stone." --Chaucer.
      [1913 Webster]

   2. Uttering no sound; silent; as, the audience is still; the
      animals are still.
      [1913 Webster]

            The sea that roared at thy command,
            At thy command was still.             --Addison.
      [1913 Webster]

   3. Not disturbed by noise or agitation; quiet; calm; as, a
      still evening; a still atmosphere. "When all the woods are
      still." --Milton.
      [1913 Webster]

   4. Comparatively quiet or silent; soft; gentle; low. "A still
      small voice." --1 Kings xix. 12.
      [1913 Webster]

   5. Constant; continual. [Obs.]
      [1913 Webster]

            By still practice learn to know thy meaning. --Shak.
      [1913 Webster]

   6. Not effervescing; not sparkling; as, still wines.
      [1913 Webster]

   Still life. (Fine Arts)
      (a) Inanimate objects.
      (b) (Painting) The class or style of painting which
          represents inanimate objects, as fruit, flowers, dead
          game, etc.
          [1913 Webster]

   Syn: Quiet; calm; noiseless; serene; motionless; inert;
        stagnant.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Still life \Still" life\, n.
   1. a type of painting in which inanimate objects such as
      flowers or fruit are represented.
      [PJC]

   2. the inanimate subject matter of a still life painting or
      photograph; as, to painted only still life.
      [PJC]

WordNet (r) 3.0 (2006):

still life
    n 1: a painting of inanimate objects such as fruit or flowers

Moby Thesaurus II by Grady Ward, 1.0:

59 Moby Thesaurus words for "still life":
   abstract, abstraction, altarpiece, art object, block print,
   brainchild, bric-a-brac, classic, collage, color print,
   composition, copy, creation, cyclorama, daub, design, diptych,
   engraving, fresco, grotesque, icon, illumination, illustration,
   image, kitsch, likeness, master, masterpiece, masterwork,
   miniature, mobile, montage, mosaic, mural, museum piece, nude,
   old master, panorama, pasticcio, pastiche, photograph, picture,
   piece, piece of virtu, print, representation, reproduction,
   stabile, stained glass window, statue, stencil, study, tableau,
   tapestry, triptych, virtu, wall painting, work, work of art