What is the meaning of Look_up?

Used other than figuratively or idiomatically: see look,‎ up.

To have better prospects.

To obtain, or seek to obtain, information about something.

1. To obtain information about something from a reference book.

   To obtain information about something from a reference book.

   To enter a query into a database or search engine.

   To reconnect or meet with someone that one used to know.

   Source: wiktionary.org