To get or bring something back from a place. She went to retrieve her coat from the closet.
To find and bring back information from a computer system. The program can quickly retrieve data from the database.
To recover or regain something that was lost or misplaced. He managed to retrieve his lost wallet from the restaurant.
To rescue or bring back to a satisfactory state; to put right or salvage. Management is trying hard to retrieve the situation after the unexpected losses.