know about

English

Verb

know about (third-person singular simple present knows about, present participle knowing about, simple past knew about, past participle known about)

1. Used other than figuratively or idiomatically: see know,‎ about.
2. (informal, usually negative) To have positive inclinations regarding (someone or something); to have no doubts regarding (someone or something).

   I don't know about him.

   You never know about that family.