A "relative" refers to a person who is connected to another by blood or marriage. This includes family members such as parents, siblings, grandparents, aunts, uncles, and cousins. Relatives can play significant roles in an individual's life, providing support, companionship, and a sense of belonging. In a broader context, the term "relative" can also describe something that is considered in relation to something else. For example, in science, concepts like speed or temperature can be understood as relative measurements, depending on the frame of reference or conditions under which they are observed.