Source : Webster's Revised Unabridged Dictionary (1913)

Requirement \Re*quire"ment\ (-ment), n.
   1. The act of requiring; demand; requisition.

   2. That which is required; an imperative or authoritative
      command; an essential condition; something needed or
      necessary; a need.

            One of those who believe that they can fill up every
            requirement contained in the rule of righteousness.
                                                  --J. M. Mason.

            God gave her the child, and gave her too an
            instinctive knowledge of its nature and
            requirements.                         --Hawthorne.

Source : WordNet®

requirement
     n 1: required activity; "the requirements of his work affected
          his health"; "there were many demands on his time" [syn:
           {demand}]
     2: anything indispensable; "food and shelter are necessities of
        life"; "the essentials of the good life"; "allow farmers
        to buy their requirements under favorable conditions"; "a
        place where the requisites of water fuel and fodder can be
        obtained" [syn: {necessity}, {essential}, {requisite}, {necessary}]
        [ant: {inessential}]
     3: something that is required in advance; "Latin was a
        prerequisite for admission" [syn: {prerequisite}]