Definitions

1. noun

the person or thing referred to: used to refer to oneself or one’s own interests

“She took care of herself after the accident.”

2. pronoun

used to refer to oneself: used instead of a name, especially when the speaker is addressing oneself or referring to oneself in the third person

“He told himself to be more careful next time.”

3. adjective

belonging to or characteristic of oneself

“It was a self-contained unit.”