possessorPronunciation: /pəˈzɛsə(r)/Translate possessor | into German | into Italian | into Spanish Definition of possessor noun a person who owns something or has a particular quality:his father was the possessor of a considerable fortune Law a person who takes, occupies, or holds something without necessarily having ownership, or as distinguished from the owner. Derivatives possessory adjective possessor in other Oxford dictionaries Definition of possessor in the US English dictionary