Source : Webster's Revised Unabridged Dictionary (1913)

Deem \Deem\, v. i.
   1. To be of opinion; to think; to estimate; to opine; to
      suppose.

            And deemest thou as those who pore, With aged eyes,
            short way before?                     --Emerson.

   2. To pass judgment. [Obs.] --Spenser.

Deem \Deem\, n.
   Opinion; judgment. [Obs.] --Shak.

Deem \Deem\, v. t. [imp. & p. p. {Deemed}; p. pr. & vb. n.
   {Deeming}.] [OE. demen to judge, condemn, AS. d?man, fr. d?m
   doom; akin to OFries. d?ma, OS. ad?mian, D. doemen, OHG.
   tuommen, Icel. d[ae]ma, Sw. d["o]mma, Dan. d["o]mme, Goth.
   d?mjan. See {Doom}, n., and cf. {Doom}, v.]
   1. To decide; to judge; to sentence; to condemn. [Obs.]

            Claudius . . . Was demed for to hang upon a tree.
                                                  --Chaucer.

   2. To account; to esteem; to think; to judge; to hold in
      opinion; to regard.

            For never can I deem him less him less than god.
                                                  --Dryden.

Source : WordNet®

deem
     v : keep in mind or convey as a conviction or view; "take for
         granted"; "view as important"; "hold these truths to be
         self-evident"; "I hold him personally responsible" [syn:
         {hold}, {view as}, {take for}]