1. noun
a) A lid.
Theres a $15 cover tonight.
b) The hiding from view.
We need to set another cover for the Smith party.
2. adjective
a) Of or pertaining to the front cover of a book or magazine.
b) Of, pertaining to, or consisting of cover versions.
3. verb
He covered the baby with a blanket.
b) To be over or upon, as to conceal or protect.
When the pot comes to a boil, cover it and reduce the heat to medium.
Wikipedia foundation.