MY

I. adjective Etymology: Middle English, from Old English mīn, from mīn, suppletive genitive of ic I; akin to Old English mē me Date: 12th century of or relating to me or ~self especially as possessor, agent, object of an action, or familiar person , 2. — used interjectionally to express surprise and sometimes reduplicated — used also interjectionally with names of various parts of the body to express doubt or disapproval II. abbreviation million years