Source : Webster's Revised Unabridged Dictionary (1913)

Deforce \De*force"\, v. t. [imp. & p. p. {Deforced}; p. pr. &
   vb. n. {Deforcing}.] [OF. deforcier; de- or des- (L. de or
   dis-) + forcier, F. forcer. See {Force}, v.] (Law)
   (a) To keep from the rightful owner; to withhold wrongfully
       the possession of, as of lands or a freehold.
   (b) (Scots Law) To resist the execution of the law; to oppose
       by force, as an officer in the execution of his duty.
       --Burrill.