Cover (container), a lid as in album cover Cover (telecommunications), a communications concealment technique Cover (philately), generic term for envelope or package Cover (law), the guide for the breach of a contract for the receipt of goods. Cover version, the recently version of a antecedently recorded song Cover band, a musical band that plays exclusively covers Cover (topology), the mathematical conception of the collection of subsets of the placed whose union is the whole set Cover (unit), an area approximately equal to 2698 square metres Cover (military), a form of protection around combat Cover (intelligence), the putative occupation or even purpose of an agent.