| Definition -
A pronoun that shows ownership or possession.
1. Modern English's seven possessive pronouns are mine, yours, his, hers, its, ours, and theirs.
2. Adjectives that shows possession — such as my, our, and their — are called possessive adjectives.
Example - This Bud is mine.
Oxford English Dictionary - The term's first citation is from 1530:
"Where as we use our pronownes possessyves."
(Palsgr. Introd. 41)