The time period of a human being's majority; the time during which a human being has reached physical maturity, and ending with its death.
The state or condition of a human being once it has reached physical maturity, and is presumed to have reached a state of psychological maturity, to wit: once it has become an adult.
What it means to be human; the experiences, characteristics, and limitations of life shared by all humans, as opposed to other lifeforms.