To have knowledge; to have information, be informed.
To perceive the truth or factuality of; to be certain of or that.
To experience.
To understand or have a grasp of through experience or study.
To be or become aware or cognizant.
To be able to play or perform (a song or other piece of music).
To be acquainted or familiar with; to have encountered.
To be aware of; to be cognizant of.
To recognize as the same (as someone or something previously encountered) after an absence or change.
Knowledge; the state of knowing.
Knowledge; the state of knowing; now confined to the fixed phrase ‘in the know’
To obtain, or seek to obtain, information about something.
To reconnect or meet with someone that one used to know.
To obtain information about something from a reference book.
To have better prospects.
To enter a query into a database or search engine.
Used other than figuratively or idiomatically: see look, up.