possessive
US /pəˈzes.ɪv/
UK /pəˈzes.ɪv/

1.
demanding someone's total attention and love
:
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He became very possessive of his girlfriend.
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Her possessive nature made their relationship difficult.
2.
relating to the case of nouns, pronouns, and adjectives that expresses possession or close association
:
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In English, 'my' and 'your' are possessive adjectives.
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The apostrophe 's' is used to form the possessive case of nouns.
1.
a word or form expressing possession
:
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The word 'mine' is a possessive.
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English has both possessives for nouns (e.g., 'John's car') and pronouns (e.g., 'hers').