From The Collaborative International Dictionary of English v.0.48:
Covert \Cov"ert\, n. [OF. See Covert, a.] 1. A place that covers and protects; a shelter; a defense. [1913 Webster]
A tabernacle . . . for a covert from storm. --Is. iv. 6. [1913 Webster]
The highwayman has darted from his covered by the wayside. --Prescott. [1913 Webster]
2. [Cf. F. couverte.] (Zool.) One of the special feathers covering the bases of the quills of the wings and tail of a bird. See Illust. of Bird. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
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. [1913 Webster]
How covert matters may be best disclosed. --Shak. [1913 Webster]
Whether of open war or covert guile. --Milton [1913 Webster]
2. Sheltered; not open or exposed; retired; protected; as, a covert nook. -- Wordsworth. [1913 Webster]
Of either side the green, to plant a covert alley. --Bacon. [1913 Webster]
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. [1913 Webster]
Covert way, (Fort.) See Covered way, under Covered.
Syn: Hidden; secret; private; covered; disguised; insidious; concealed. See Hidden. [1913 Webster]