Is marriage a civil right?

I am guessing most of the responses will be yes, but maybe I’ll be surprised. I am not necessarily asking if you think all people of all sexualities should be permitted to marry. I know that may tie in to some degree, but moreso I am simply saying is marriage, in and of itself, a civil right, or should we define it otherwise. I know that some people feel that marriage in no way should belong to the state. Perhaps many feel otherwise. I am just wanting to know arguments for and against marriage being a civil right. Also, we may need someone to give us a good definition of civil right.