Definitions

1. pronoun

used as the object of a verb, especially a reflexive verb, to indicate that the action is being performed on the person or people mentioned

“They took care of themselves over the weekend.”

2. noun

people, especially family or friends, who are not easily forgotten or replaced

“She thought of herself and her family themselves as lucky to have escaped the disaster.”

3. adverb

used to indicate that an action is being performed by the person or people mentioned

“They decorated the house themselves for the holiday.”