3a plain ring worn to preserve a hole in a pierced ear lobe; a sleeper.
a ring worn to keep a more valuable one on the finger.
a bar of soft iron placed across the poles of a horseshoe magnet to maintain its strength.
4 [with adjective] a food or drink that remains in a specified condition if stored:hazelnuts are good keepers
5a fish large enough to be kept when caught:these lakes consistently give up healthy, pound-size keepers
informal a person or thing that is valuable and to be cherished:this disc is a keeper and one that belongs on every serious DVD collector’s shelfif he’s a good communicator and a great listener, he’s a keeper
6 American Football a play in which the quarterback receives the ball from the centre and runs with it.