Someone who is possessive about another person wants all that person's love and attention.

Someone who is possessive about things that they own does not like other people to use them.

In grammar, a possessive determiner or possessive adjective is a word such as 'my' or 'his' which shows who or what something belongs to or is connected with. The possessive form of a name or noun has 's added to it, as in 'Jenny's' or 'cat's'.

A possessive is a possessive determiner or the possessive form of a name or noun.