whos·ever I. \(ˈ)hü|zevə(r)\adjective Etymology:whose (II) + ever : of, belonging to, or relating to whomever < whosever hat this is, I wish he would come and claim it > II. pronoun : whosever one or whosever ones — used without a following noun as a pronoun equivalent in meaning to the adjective whosever < whosever these gloves are, I wish he would come and claim them >