Definition of out of one's mind
- What a ridiculous idea! You must be out of your mind to believe that.
: in a direction away from the inside or center
: from among others
: eject, oust
: to identify publicly as being such secretly
: to become publicly known
used as a function word to indicate an outward movement
: situated outside : external
: situated at a distance : outlying
: one who is out of office or power or on the outside
: an act or instance of putting a player out or of being put out in baseball
: in a manner that exceeds or surpasses and sometimes overpowers or defeats
What made you want to look up out of one's mind? Please tell us where you read or heard it (including the quote, if possible).