The edge covering number of a graph is the minimum number of edges that need to be selected such that every vertex of the graph is incident to at least one selected edge.

I covered my friend's ass by taking the blame for the mistake.

I have a first flight cover in my stamp collection.

The first flight covers were designed to protect the aircraft during takeoff and landing.

She covered her feet with a warm blanket.

He was working under a non-official cover as a diplomat.

I always make sure to cover all of the bases before making a decision.

I always make sure to cover all the bases before making a decision.

I have a collection of first day covers.

I accidentally blew his cover when I mentioned his secret hobby.