The Collaborative International Dictionary of English v.0.48:

Fruit \Fruit\, n. [OE. fruit, frut, F. fruit, from L. fructus
   enjoyment, product, fruit, from frui, p. p. fructus, to
   enjoy; akin to E. brook, v. t. See Brook, v. t., and cf.
   Fructify, Frugal.]
   1. Whatever is produced for the nourishment or enjoyment of
      man or animals by the processes of vegetable growth, as
      corn, grass, cotton, flax, etc.; -- commonly used in the
      plural.
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            Six years thou shalt sow thy land, and shalt gather
            in the
            fruits thereof.                       --Ex. xxiii.
                                                  10.
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   2. (Hort.) The pulpy, edible seed vessels of certain plants,
      especially those grown on branches above ground, as
      apples, oranges, grapes, melons, berries, etc. See 3.
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   3. (Bot.) The ripened ovary of a flowering plant, with its
      contents and whatever parts are consolidated with it.
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   Note: Fruits are classified as fleshy, drupaceous, and dry.
         Fleshy fruits include berries, gourds, and melons,
         orangelike fruits and pomes; drupaceous fruits are
         stony within and fleshy without, as peaches, plums, and
         cherries; and dry fruits are further divided into
         achenes, follicles, legumes, capsules, nuts,
         and several other kinds.
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   4. (Bot.) The spore cases or conceptacles of flowerless
      plants, as of ferns, mosses, algae, etc., with the spores
      contained in them.
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   6. The produce of animals; offspring; young; as, the fruit of
      the womb, of the loins, of the body.
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            King Edward's fruit, true heir to the English crown.
                                                  --Shak.
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   6. That which is produced; the effect or consequence of any
      action; advantageous or desirable product or result;
      disadvantageous or evil consequence or effect; as, the
      fruits of labor, of self-denial, of intemperance.
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            The fruit of rashness.                --Shak.
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            What I obtained was the fruit of no bargain.
                                                  --Burke.
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            They shall eat the fruit of their doings. --Is. iii
                                                  10.
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            The fruits of this education became visible.
                                                  --Macaulay.
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   Note: Fruit is frequently used adjectively, signifying of,
         for, or pertaining to a fruit or fruits; as, fruit bud;
         fruit frame; fruit jar; fruit knife; fruit loft; fruit
         show; fruit stall; fruit tree; etc.
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   Fruit bat (Zool.), one of the Frugivora; -- called also
      fruit-eating bat.

   Fruit bud (Bot.), a bud that produces fruit; -- in most
      oplants the same as the power bud.

   Fruit dot (Bot.), a collection of fruit cases, as in ferns.
      See Sorus.

   Fruit fly (Zool.), a small dipterous insect of the genus
      Drosophila, which lives in fruit, in the larval state.
      There are seveal species, some of which are very damaging
      to fruit crops. One species, Drosophila melanogaster,
      has been intensively studied as a model species for
      genetic reserach.

   Fruit jar, a jar for holding preserved fruit, usually made
      of glass or earthenware.

   Fruit pigeon (Zool.), one of numerous species of pigeons of
      the family Carpophagid[ae], inhabiting India, Australia,
      and the Pacific Islands. They feed largely upon fruit. and
      are noted for their beautiful colors.

   Fruit sugar (Chem.), a kind of sugar occurring, naturally
      formed, in many ripe fruits, and in honey; levulose. The
      name is also, though rarely, applied to invert sugar, or
      to the natural mixture or dextrose and levulose resembling
      it, and found in fruits and honey.

   Fruit tree (Hort.), a tree cultivated for its edible fruit.


   Fruit worm (Zool.), one of numerous species of insect
      larv[ae]: which live in the interior of fruit. They are
      mostly small species of Lepidoptera and Diptera.

   Small fruits (Hort.), currants, raspberries, strawberries,
      etc.
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WordNet (r) 3.0 (2006):

fruit fly
    n 1: any of numerous small insects whose larvae feed on fruits
         [syn: fruit fly, pomace fly]