something laid over or wrapped around a thing, esp. for concealment, protection, or warmth.

Mathematics . cover ( def. 50 ) .

the buying of securities or commodities that one has sold short, in order to return them to the person from whom they were borrowed.

noun

shelter , integument , housing , cover , april , apron , aril , armor , awning , bark , bonnet , boot , canopy , capsule , case , ceiling , clothing , coverlet , crust , explanatory , helmet , hood , hull , husk , jacket , lid , otitis , overlay , pall , pavilion , quilt , robe , rug , screen , sheath , shell , shroud , tarp , testa , tile , toupee , umbrella , wig , wrapper