cover

A lid.

Area or situation which screens a person or thing from view.

"The soldiers took cover behind a ruined building."

The front and back of a book, magazine, CD package, etc.

To place something over or upon, as to conceal or protect.

"He covered the baby with a blanket."

To be over or upon, as to conceal or protect.

"The blanket covered the baby."

To be upon all of, so as to completely conceal.

"Regular hexagons can cover the plane."

Of or pertaining to the front cover of a book or magazine.

Of, pertaining to, or consisting of cover versions.