keep to oneself

keep to oneself (third-person singular simple present keeps to oneself, present participle keeping to oneself, simple past and past participle kept to oneself)

1. (idiomatic, intransitive) To purposely avoid interaction with others; to be introverted.

   She preferred to keep to herself after her husband died.

2. (idiomatic, transitive) To refrain from telling or giving; to keep secret, or refuse to share.
   • 1900, Mark Twain, The Man That Corrupted Hadleyburg, Chapter IV:

     Then he fell to gabbling strange and dreadful things which were not clearly understandable, and which the doctor admonished them to keep to themselves.