1. [n]  a small private room for study or prayer
2. [n]  a small room (or recess) or cabinet used for storage space
3. [n]  a tall piece of furniture that provides storage space for clothes; has a door and rails or hooks for hanging clothes
4. [n]  a toilet in England
5. [v]  confine to a small space, as for intensive work

1. \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.
   

2. \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.
   

as used in the New Testament, signifies properly a storehouse (Luke 12: 24), and hence a place of privacy and retirement (Matt. 6:6; Luke 12:3).