Ne·ces·si·tate v. t. [imp. & p. p. Necessitated p. pr. & vb. n. Necessitating ]
  1. To make necessary or indispensable; to render unavoidable.
     Sickness [might] necessitate his removal from the court.   --South.
     This fact necessitates a second line.   --J. Peile.
  2. To reduce to the necessity of; to force; to compel.
     The Marquis of Newcastle, being pressed on both sides, was necessitated to draw all his army into York.   --Clarendon.
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