wanting someone to have feelings of love or friendship for you and no one else
She was terribly possessive of our eldest son.
unwilling to let other people use something you own
He's so possessive about his new car.
used in grammar to show that something belongs to someone or something
possessive pronoun/form/case etc
the possessive pronouns 'ours' and 'mine'
—possessiveness noun [uncountable]