Elder/ˈeldər/ Definition 1 of 4Pro Tip 1/3Respectful Address Used to address someone respectfully due to their age or experience in a group. May I ask the elder for advice? Pro Tip 2/3Relative Age Indicates someone is older than you, but not necessarily old in general. My elder cousin is only two years older than me. Pro Tip 3/3Family Hierarchy Often used to describe the birth order among siblings in a family. As the elder, I look after my brothers.