one·self / wənˈself/ (also one's self) • pron. [third person sing.] 1. [reflexive] a person's own self: it is difficult to wrest oneself away resolves that one makes to oneself.2. used to emphasize that one does something individually or unaided: the idea of publishing a book oneself.3. in one's normal and individual state of body or mind; not influenced by others: freedom to be oneself.PHRASES: by oneself see by.