The Collaborative International Dictionary of English v.0.48:

Cage \Cage\, n. [F. cage, fr. L. cavea cavity, cage, fr. cavus
   hollow. Cf. Cave, n., Cajole, Gabion.]
   [1913 Webster]
   1. A box or inclosure, wholly or partly of openwork, in wood
      or metal, used for confining birds or other animals.
      [1913 Webster]

            In his cage, like parrot fine and gay. --Cowper.
      [1913 Webster]

   2. A place of confinement for malefactors --Shak.
      [1913 Webster]

            Stone walls do not a prison make,
            Nor iron bars a cage.                 --Lovelace.
      [1913 Webster]

   3. (Carp.) An outer framework of timber, inclosing something
      within it; as, the cage of a staircase. --Gwilt.
      [1913 Webster]

   4. (Mach.)
      (a) A skeleton frame to limit the motion of a loose piece,
          as a ball valve.
      (b) A wirework strainer, used in connection with pumps and
          pipes.
          [1913 Webster]

   5. The box, bucket, or inclosed platform of a lift or
      elevator; a cagelike structure moving in a shaft.
      [1913 Webster]

   6. (Mining) The drum on which the rope is wound in a hoisting
      whim.
      [1913 Webster]

   7. (Baseball) The catcher's wire mask.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cage \Cage\ (k[=a]j), v. i. [imp. & p. p. Caged (k[=a]jd); p.
   pr. & vb. n. Caging.]
   To confine in, or as in, a cage; to shut up or confine.
   "Caged and starved to death." --Cowper.
   [1913 Webster]

WordNet (r) 3.0 (2006):

cage
    n 1: an enclosure made or wire or metal bars in which birds or
         animals can be kept [syn: cage, coop]
    2: something that restricts freedom as a cage restricts movement
    3: United States composer of avant-garde music (1912-1992) [syn:
       Cage, John Cage, John Milton Cage Jr.]
    4: the net that is the goal in ice hockey
    5: a movable screen placed behind home base to catch balls
       during batting practice [syn: batting cage, cage]
    v 1: confine in a cage; "The animal was caged" [syn: cage,
         cage in]

Moby Thesaurus II by Grady Ward, 1.0:

94 Moby Thesaurus words for "cage":
   beleaguer, beset, besiege, blockade, bottle up, bound, box in,
   box up, chamber, check, cloister, close in, compass, confine,
   constrain, contain, coop, coop in, coop up, cordon, cordon off,
   cork up, corral, crate, crib, detain, drive, drove, encage,
   encircle, enclose, enclosure, encompass, enshrine, fence in, goad,
   hedge in, hell, hem in, herd, hold, hold in custody,
   hold in restraint, house in, hutch, immure, impound, imprison, in,
   incarcerate, include, inhibit, jail, keep in, keep in custody,
   keep in detention, kennel, lash, leaguer, limbo, mew, mew up, pen,
   pen in, pen up, penfold, pinfold, place of confinement, pocket,
   pound, prick, punch cattle, purgatory, quarantine, rail in,
   restrain, restrict, ride herd on, round up, seal up, shackle,
   shepherd, shrine, shut in, shut up, spur, stable, surround,
   wall in, whip, wrangle, wrap, yard, yard up



The Free On-line Dictionary of Computing (30 December 2018):

CAGE

   Early system on IBM 704.  Listed in CACM 2(5):16 (May 1959).


Easton's 1897 Bible Dictionary:

Cage
   (Heb. kelub', Jer. 5:27, marg. "coop;" rendered "basket" in Amos
   8:1), a basket of wicker-work in which birds were placed after
   being caught. In Rev. 18:2 it is the rendering of the Greek
   _phulake_, properly a prison or place of confinement.