Required

from WordNet (r) 3.0 (2006)
required
    adj 1: necessary for relief or supply; "provided them with all
           things needful" [syn: {needed}, {needful}, {required},
           {requisite}]
    2: required by rule; "in most schools physical education is
       compulsory"; "attendance is mandatory"; "required reading"
       [syn: {compulsory}, {mandatory}, {required}]
    
from The Collaborative International Dictionary of English v.0.48
Require \Re*quire"\ (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]
    
from Moby Thesaurus II by Grady Ward, 1.0
42 Moby Thesaurus words for "required":
      absolute, binding, called for, compulsatory, compulsory,
      conclusive, de rigueur, decisive, decretory, dictated, entailed,
      essential, final, hard-and-fast, imperative, imperious, imposed,
      indicated, indispensable, inevitable, involuntary, irreducible,
      irreductible, irreplaceable, irrevocable, mandated, mandatory,
      must, necessary, needed, needful, obligatory, peremptory,
      prerequisite, prescript, prescriptive, requisite, ultimate,
      unforgoable, vital, wanted, without appeal

    

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