The Collaborative International Dictionary of English v.0.48:

Confine \Con*fine"\ (k[o^]n*f[imac]n"), v. t. [imp. & p. p.
   Confined; p. pr. & vb. n. Confining.] [F. confiner to
   border upon, LL. confinare to set bounds to; con- + finis
   boundary, end. See Final, Finish.]
   To restrain within limits; to restrict; to limit; to bound;
   to shut up; to inclose; to keep close.
   [1913 Webster]

         Now let not nature's hand
         Keep the wild flood confined! let order die! --Shak.
   [1913 Webster]

         He is to confine himself to the compass of numbers and
         the slavery of rhyme.                    --Dryden.
   [1913 Webster]

   To be confined, to be in childbed.

   Syn: To bound; limit; restrain; imprison; immure; inclose;
        circumscribe; restrict.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

confined \confined\ adj.
   1. having movement restricted to within a certain area; --
      usually a building. Opposite of unconfined.

   Note: [Narrower terms: claustrophobic; close, confining;
         homebound, housebound, shut-in; in
         childbed(prenominal); pent, shut up(predicate);
         snowbound; weather-bound; stormbound,
         storm-bound]
         [WordNet 1.5]

   2. deprived of liberty; especially placed under arrest or
      restraint.
      [WordNet 1.5]

   3. having movement restricted to within an enclosed outdoor
      area; -- of animals.

   Syn: fenced in, penned.
        [WordNet 1.5]

   4. (Med.) not invading healthy tissue.
      [WordNet 1.5]

   5. held prisoner.

   Syn: captive, imprisoned, jailed.
        [WordNet 1.5]

   6. having movement or progress restricted to a certain area;
      as, an outbreak of the plague confined to one quarter of
      the city; wildfires confined to within the canyon.
      [PJC]

WordNet (r) 3.0 (2006):

confined
    adj 1: not invading healthy tissue [ant: invasive]
    2: not free to move about [ant: unconfined]
    3: being in captivity [syn: captive, confined, imprisoned,
       jailed]