possessive

Concise Oxford English Dictionary © 2008 Oxford University Press:
possessive/pəˈzesɪv/

▶adjective

• 1 demanding someone's total attention and love.

• 2 showing an unwillingness to share one's possessions.

• 3 Grammar relating to or denoting the case of nouns and pronouns expressing possession.

– derivatives
possessively adverb,
possessiveness noun.