[1] : The Collaborative International Dictionary of English v.0.48

require \require"\ r?-kw?r", v. t. imp.  p. p. required
   -kw?rd"; p. pr.  vb. n. requiring. oe. requeren,
   requiren, of. requerre, f. requ?rir; l. pref. re- re- +
   quaerere to ask; cf. l. requirere. see query, and cf.
   request, requisite.
   1. to demand; to insist upon having; to claim as by right and
      authority; to exact; as, to require the surrender of
      property.
      1913 webster

            shall i say to caesar
            what you require of him?              --shak.
      1913 webster

            by nature did what was by law required. --dryden.
      1913 webster

   2. to demand or exact as indispensable; to need.
      1913 webster

            just gave what life required, and gave no more.
                                                  --goldsmith.
      1913 webster

            the two last biographies require to be
            particularly noticed.                 --j. a.
                                                  symonds.
      1913 webster

   3. to ask as a favor; to request.
      1913 webster

            i was ashamed to require of the king a band of
            soldiers and horsemen to help us against the enemy
            in the way.                           --ezra viii.
                                                  22.
      1913 webster

   syn: to claim; exact; enjoin; prescribe; direct; order;
        demand; need.
        1913 webster
see also:
required requiring query request requisite 

[2] : WordNet (r) 2.0

require
     v 1: require as useful, just, or proper; "it takes nerve to do
          what she did"; "success usually requires hard work";
          "this job asks a lot of patience and skill"; "this
          position demands a lot of personal sacrifice"; "this
          dinner calls for a spectacular dessert"; "this
          intervention does not postulates a patient's consent"
          syn: necessitate, ask, postulate, need, take,
           involve, call for, demand ant: obviate
     2: consider obligatory; request and expect; "we require our
        secretary to be on time"; "aren't we asking too much of
        these children?"; "i expect my students to arrive in time
        for their lessons" syn: ask, expect
     3: make someone do something syn: command, compel
     4: have need of; "this piano wants the attention of a competent
        tuner" syn: want, need
see also:
necessitate ask postulate need take involve 
call for demand obviate expect command 
compel want 

[3] : Moby Thesaurus II by Grady Ward, 1.0

90 moby thesaurus words for "require":
   affect, appoint, ask, ask for, assess, assume, authorize,
   be hurting for, be indicated, bind, blackmail, bring,
   brook no denial, call, call for, challenge, charge, charge for,
   claim, clamor for, coerce, command, commit, comprise, contain,
   crave, cry for, cry out for, demand, desire, dictate, entail,
   exact, extort, force, have occasion for, implicate, imply, impose,
   indent, insist, instruct, involve, issue an ultimatum, lack,
   lay down, lead to, leave no option, levy, make, make a demand,
   make dutiable, make imperative, make incumbent, make obligatory,
   miss, necessitate, need, obligate, oblige, order, order up,
   place an order, pledge, postulate, prerequire, prescribe, presume,
   presuppose, pro rata, prorate, put in requisition, requisition,
   run short of, saddle with, screw, set, solicit, stick for, subsume,
   take, take doing, take in, take no denial, tax, tie, tithe, want,
   want doing, warn

Require >> R Words
Require, definition of term: Require
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