As a noun, a "relative" is someone or something that is related to someone or something else. Between people it refers to biological or legal relationships, such as sibling, parent, or spouse. Between things it often refers to a similarity of origin or use; for example, a teaspoon is a relative of a ladle: a ladle is a very big spoon that we use to move liquid foods from one container to another, while a teaspoon is a small spool we use to stir drinks or perhaps to eat foods that have a lot of liquid. As an adjective, something "is relative" when it has some type of connection to something else, usually because changing something to the first thing can have some effect on the second thing. Also, you can measure something relative to something else: one thing is the point of reference, and you measure the difference between it and the other thing.

A relative is used to describe the person that is related to someone. Also note that related to , can also be used for non personal relationships. Links between things. You notice the use of this in many crime series.