: something or someone that is worth keeping : something or someone that is good, valuable, etc.

What does it mean when a person is a keeper?

keeper noun [C] (GOOD PERSON/THING)

someone with good qualities, who you can have a long relationship with: If he introduces you to all his friends, he's a keeper. informal.

What type of word is keeper?

A person who keeps something. A person charged with guarding or caring for, storing, or maintaining something; a custodian, a guard. ...