Learner's definition of HIMSELF
1 : that same man, boy, or male animal: a — used as the object of a verb or preposition to refer to a man, boy, or male animal that has already been mentioned
b — used for emphasis to refer again to a man, boy, or male animal that has already been mentioned
He accidentally cut himself while shaving.
He bought himself a new wallet. = He bought a new wallet for himself.
He doesn't consider himself old. = He doesn't think of himself as (being) old.
The cat washed himself.
He wrote a note to himself.
He had the house (all) to himself. [=he was alone in the house]
“It's almost morning,” he said to himself.
He wanted to see it for himself. [=he wanted to see it rather than have someone tell him about it, describe it to him, etc.]
He told me himself that he was broke. = He himself told me (that) he was broke.
He reminded them that he was young once himself.
The proposal was made by the governor himself.
The composer himself conducted the symphony.
2 : that same person — used to indicate either a male or female object of a verb or preposition
◊ This use of himself was common in the past but is now often avoided because it is considered sexist.
3 : his normal or healthy self
After a good night's sleep, he felt like himself again.
He's not himself today; something must be bothering him.
He was nervous about meeting them, but I told him to just be himself. [=to behave like he normally does]
1 : without any help from other people 2 : with nobody else : alone