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.
To obtain, or seek to obtain, information about something.
To be courageous; to regain one's courage.
Used when encouraging someone to bear or take up a difficult situation.