1. A member of the genus Homo and especially of the species H. sapiens. 2. A person: the extraordinary humans who explored Antarctica. adj. 1. Of, relating to, or characteristic of humans: the course of human events; the human race. 2. Having or showing those positive aspects of nature and character regarded as distinguishing humans from other animals: an act of human kindness. 3. Subject to or indicative of the weaknesses, imperfections, and fragility associated with humans: a mistake that shows he's only human; human frailty. 4. Having the form of a human. 5. Made up of humans: formed a human bridge across the ice.