A hominid is a member of the taxonomic family Hominidae, which includes eight extant species in four genera: Pongo, Gorilla, Pan, and Homo, of which only modern humans remain. The definition of the term "hominid" has changed over time, and its current meaning includes all the great apes, including humans. However, the earlier restrictive meaning of "hominid" referred only to humans (Homo) and their closest extinct relatives. The term "hominin" is now used to refer to all members of the human clade after the split from the chimpanzees (Pan) . The current meaning of "hominid" includes all modern and extinct great apes, while "hominin" refers to modern humans, extinct human species, and all our immediate ancestors.

In summary, a hominid is a member of the taxonomic family Hominidae, which includes all modern and extinct great apes, including humans. The term "hominin" is now used to refer to modern humans, extinct human species, and all our immediate ancestors.