The Collaborative International Dictionary of English v.0.48:

Realize \Re"al*ize\, v. i.
   To convert any kind of property into money, especially
   property representing investments, as shares in stock
   companies, bonds, etc.
   [1913 Webster]

         Wary men took the alarm, and began to realize, a word
         now first brought into use to express the conversion of
         ideal property into something real.      --W. Irving.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Realize \Re"al*ize\ (r[=e]"al*[imac]z), v. t. [imp. & p. p.
   Realized (-[imac]zd); p. pr. & vb. n. Realizing
   (-[imac]`z[i^]ng).] [Cf. F. r['e]aliser.]
   1. To make real; to convert from the imaginary or fictitious
      into the actual; to bring into concrete existence; to
      effectuate; to accomplish; as, to realize a scheme or
      project.
      [1913 Webster]

            We realize what Archimedes had only in hypothesis,
            weighing a single grain against the globe of earth.
                                                  --Glanvill.
      [1913 Webster]

   2. To cause to seem real; to impress upon the mind as actual;
      to feel vividly or strongly; to make one's own in
      apprehension or experience.
      [1913 Webster]

            Many coincidences . . . soon begin to appear in them
            [Greek inscriptions] which realize ancient history
            to us.                                --Jowett.
      [1913 Webster]

            We can not realize it in thought, that the object .
            . . had really no being at any past moment. --Sir W.
                                                  Hamilton.
      [1913 Webster]

   3. To convert into real property; to make real estate of; as,
      to realize his fortune.
      [1913 Webster]

   4. To acquire as an actual possession; to obtain as the
      result of plans and efforts; to gain; to get; as, to
      realize large profits from a speculation.
      [1913 Webster]

            Knighthood was not beyond the reach of any man who
            could by diligent thrift realize a good estate.
                                                  --Macaulay.
      [1913 Webster]

   5. To convert into actual money; as, to realize assets.
      [1913 Webster]

WordNet (r) 3.0 (2006):

realize
    v 1: be fully aware or cognizant of [syn: recognize,
         recognise, realize, realise, agnize, agnise]
    2: perceive (an idea or situation) mentally; "Now I see!"; "I
       just can't see your point"; "Does she realize how important
       this decision is?"; "I don't understand the idea" [syn:
       understand, realize, realise, see]
    3: make real or concrete; give reality or substance to; "our
       ideas must be substantiated into actions" [syn: realize,
       realise, actualize, actualise, substantiate]
    4: earn on some commercial or business transaction; earn as
       salary or wages; "How much do you make a month in your new
       job?"; "She earns a lot in her new job"; "this merger brought
       in lots of money"; "He clears $5,000 each month" [syn:
       gain, take in, clear, make, earn, realize,
       realise, pull in, bring in]
    5: convert into cash; of goods and property [syn: realize,
       realise]
    6: expand or complete (a part in a piece of baroque music) by
       supplying the harmonies indicated in the figured bass [syn:
       realize, realise]

Moby Thesaurus II by Grady Ward, 1.0:

214 Moby Thesaurus words for "realize":
   absorb, accomplish, achieve, act, actualize, adumbrate, appreciate,
   apprehend, assimilate, attain, author, be acquainted with,
   be apprised of, be aware of, be cognizant of, be conscious of,
   be conversant with, be informed, be productive, be sold,
   be with one, bear, beget, body forth, breed, bring, bring about,
   bring forth, bring in, bring into being, bring off,
   bring to effect, bring to fruition, bring to pass, call to mind,
   call up, capitalize on, cash in on, catch, catch on, catch on to,
   cause, clean up, clear, cognize, coin money, commercialize, commit,
   compass, comprehend, conceive, conceptualize, conjure up,
   constitute, consummate, create, deal with, demonstrate, dig,
   digest, discern, discharge, dispatch, dispose of, distinguish, do,
   do the job, do the trick, do to, earn, effect, effectuate, embody,
   enact, engender, engineer, envisage, envision, establish, execute,
   exemplify, fancy, father, fathom, feature, fetch, figure, follow,
   foreshadow, form, found, fulfill, gain, gain by, generate, gestate,
   get, get hold of, get the drift, get the idea, get the picture,
   give birth to, give occasion to, give origin to, give rise to,
   go and do, grasp, gross, have, have information about,
   have it taped, have knowledge of, identify, illustrate, image,
   imagine, impersonate, inaugurate, incarnate, incept, industrialize,
   inflict, install, institute, just see, ken, knock off, know,
   know again, learn, make, make a killing, make money, make money by,
   make out, manage, mass-produce, master, materialize, mirror, nail,
   net, objectify, occasion, organize, originate, overproduce, pay,
   peg, perceive, perform, perpetrate, personate, personify, picture,
   place, polish off, possess, prefigure, prehend, pretypify, produce,
   profit, project, pull off, put away, reach, read, realize on,
   recall knowledge of, recognize, reflect, reidentify, render,
   represent, return, savvy, score, see, seize, seize the meaning,
   sell, sell for, sense, set afloat, set on foot, set up, shadow,
   shadow forth, sire, spot, succeed, summon up, take, take and do,
   take care of, take in, tell, turn a penny, turn the trick,
   turn to account, turn to profit, twig, understand, up and do,
   vision, visualize, volume-produce, win, work, work out, wot,
   wot of, wreak