Source : Webster's Revised Unabridged Dictionary (1913)

Closet \Clos"et\, n. [OF. closet little inclosure, dim. of clos.
   See {Close} an inclosure.]
   1. A small room or apartment for retirement; a room for
      privacy.

            A chair-lumbered closet, just twelve feet by nine.
                                                  --Goldsmith.

            When thou prayest, enter into thy closet. --Matt.
                                                  vi. 6.

   2. A small apartment, or recess in the side of a room, for
      household utensils, clothing, etc. --Dryden.

   {Closet sin}, sin commited in privacy. --Bp. Hall.

Closet \Clos"et\, v. t. [imp. & p. pr. & vb. n. {Closeting}.]
   1. To shut up in, or as in, a closet; to conceal. [R.]

            Bedlam's closeted and handcuffed charge. --Cowper.

   2. To make into a closet for a secret interview.

            He was to call a new legislature, to closet its
            members.                              --Bancroft.

            He had been closeted with De Quadra.  --Froude.

Source : WordNet®

closet
     n 1: a small room (or recess) or cabinet used for storage space
          [syn: {cupboard}]
     2: a toilet in England [syn: {water closet}, {W.C.}, {loo}]
     3: a tall piece of furniture that provides storage space for
        clothes; has a door and rails or hooks for hanging clothes
        [syn: {wardrobe}, {press}]
     4: a small private room for study or prayer

closet
     adj 1: (of information) given in confidence or in secret; "closet
            information"; "this arrangement must be kept
            confidential"; "their secret communications" [syn: {closet(a)},
             {confidential}, {secret}]
     2: indulging only covertly; "a closet alcoholic"; "closet
        liberals" [syn: {closet(a)}, {secret}]

closet
     v : confine to a small space, as for intensive work