It depends on how it is being used in a sentence. In the most basic form, a human means a person.

Human is a simple complex creature who can think and decide to be a devil or an angel.. A package of all positive and negative points..

Here is the dictionary definition of the word 'human' As a noun: 1. A member of the genus Homo and especially of the species Homo sapiens. 2. A person: Example: The humans who explored Antarctica were brave. As an adjective: 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: Example: It was an act of human kindness. 3. Subject to or indicative of the weaknesses, imperfections, and fragility associated with humans:Example: He made a mistake that shows he's only human; human frailty. 4. Having the form of a human. 5. Made up of humans: The villagers formed a human bridge across the ice.