The Collaborative International Dictionary of English v.0.48:

Ejection \E*jec"tion\, n. [L. ejectio: cf. F. ['e]jection.]
   1. The act of ejecting or casting out; discharge; expulsion;
      evacuation. "Vast ejection of ashes." --Eustace. "The
      ejection of a word." --Johnson.
      [1913 Webster]

   2. (Physiol.) The act or process of discharging anything from
      the body, particularly the excretions.
      [1913 Webster]

   3. The state of being ejected or cast out; dispossession;
      banishment.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ejection
    n 1: the act of expelling or projecting or ejecting [syn:
         expulsion, projection, ejection, forcing out]
    2: the act of forcing out someone or something; "the ejection of
       troublemakers by the police"; "the child's expulsion from
       school" [syn: ejection, exclusion, expulsion,
       riddance]

Moby Thesaurus II by Grady Ward, 1.0:

80 Moby Thesaurus words for "ejection":
   banishment, bowshot, bullet, cannon, cashiering, clearance, conge,
   dejecta, dejection, dejecture, deportation, detachment, detonation,
   discard, discharge, disgorgement, disjunction, dismissal, disposal,
   disposition, dispossession, effluent, effusion, egesta, egestion,
   ejaculation, ejecta, ejectamenta, elimination, emission,
   eradication, eviction, excrement, excreta, excretes, excretion,
   exile, expatriation, expulsion, extravasate, extravasation,
   extrusion, exudate, exudation, firing, flow, flux, fusillade, gun,
   gunfire, gunshot, liquidation, ostracism, ouster, outburst,
   outlawing, outlawry, potshot, purge, removal, riddance, sacking,
   salvo, secretion, severance, shot, spray, stoneshot, suspension,
   tattoo, the boot, the bounce, the sack, throwing out, transudate,
   transudation, volley, waste, waste matter, withdrawal



The Devil's Dictionary (1881-1906):

EJECTION, n.  An approved remedy for the disease of garrulity.  It is
also much used in cases of extreme poverty.