your (ūr), pronoun or adjective [OE. your, ȝour, eowr, eower, AS. eówer, originally used as the gen. of ge, gē, ye; akin to OFries. iuwer your, OS. iuwar, D. uw, OHG. iuwēr, G. euer, Icel. yðar, Goth. izwara, izwar, and E. you. √189. See You.]

The form of the possessive case of the personal pronoun you.

☞ The possessive takes the form yours when the noun to which it refers is not expressed, but implied; as, this book is yours.

“An old fellow of yours.” Chaucer.

-- Webster's unabridged 1913