Source : Webster's Revised Unabridged Dictionary (1913)

Covert \Cov"ert\, n. [OF. See {Covert}, a.]
   1. A place that covers and protects; a shelter; a defense.

            A tabernacle . . . for a covert from storm. --Is.
                                                  iv. 6.

            The highwayman has darted from his covered by the
            wayside.                              --Prescott.

   2. [Cf. F. couverte.] (Zo["o]l.) One of the special feathers
      covering the bases of the quills of the wings and tail of
      a bird. See Illust. of {Bird}.

Covert \Cov"ert\ (k?v"?rt), a. [OF. covert, F. couvert, p. p. of
   couvrir. See {Cover}, v. t.]
   1. Covered over; private; hid; secret; disguised.

            How covert matters may be best disclosed. --Shak.

            Whether of open war or covert guile.  --Milton

   2. Sheltered; not open or exposed; retired; protected; as, a
      covert nook. -- Wordsworth.

            Of either side the green, to plant a covert alley.
                                                  --Bacon.

   3. (Law) Under cover, authority or protection; as, a feme
      covert, a married woman who is considered as being under
      the protection and control of her husband.

   {Covert way}, (Fort.) See {Covered way}, under {Covered}.

   Syn: Hidden; secret; private; covered; disguised; insidious;
        concealed. See {Hidden}.

Source : WordNet®

covert
     adj 1: secret or hidden; not openly practiced or engaged in or
            shown or avowed; "covert actions by the CIA"; "covert
            funding for the rebels" [ant: {overt}]
     2: of a wife; under the protection of her husband

covert
     n 1: a flock of coots
     2: a covering that serves to conceal or shelter something;
        "they crouched behind the screen"; "under cover of
        darkness" [syn: {screen}, {cover}, {concealment}]