Hominid: A group of modern humans and their closest extinct relatives, including great apes like chimpanzees, gorillas, and orangutans.
Hominin: A subgroup of hominids that includes modern humans and our direct ancestors, specifically those that are more closely related to us than to chimpanzees.
Primate: An order of mammals that includes humans, monkeys, apes, and prosimians like lemurs; characterized by flexible hands, forward-facing eyes, and higher brain development.