cover (someone or something) against (something)
1. To protect someone or something. Be sure to cover the flowers against the thunderstorm that's coming.
2. To grant one insurance for a particular problem or scenario. Does our homeowner's insurance cover us against flood damage?
cover someone or something against something
1. to cover someone or something as protection against something. You should cover your ears against the cold. I covered little Jimmy against the night's drafts. I covered myself against the driving rain.
2. Rur. [for an insurer] to provide insurance on someone or something against some peril. The insurance policy covered us against losses. This policy covers your car against theft.