adj. & n.
adj. secret or disguised (a covert glance; covert operations).
n. 1 a shelter, esp. a thicket hiding game. 2 a feather covering the base of a bird's flight-feather. covert coat a short, light, overcoat worn for shooting, riding, etc. covertly adv. covertness n.
[ ME f. OF covert past part. of covrir COVER ]