ONESELF | meaning in the Cambridge English Dictionary

oneself

pronoun

  formal uk /ˌwʌnˈself/ us /ˌwʌnˈself/

C1

the reflexive form of the pronoun 'one' when it refers to people in general or to the person speaking:

One has to learn to control oneself.

More examples

• When one looks at oneself in the mirror, it is hard to be uncritical.
• One has to look after oneself carefully in these circumstances.
• It is dangerous to see oneself as indispensable.