Adulthood (noun)

The state or period of being an adult, especially the period of life after adolescence, typically regarded as age 20 to 65.

Origin:

Early 17th century: from adult + -hood.

Examples:

1. He struggled with the responsibilities and challenges of adulthood.
2. Adulthood is a time of personal growth and independence.
3. Her parents were proud of her as she approached adulthood.
4. The transition to adulthood can be difficult for many young people.
5. Adulthood is a time to make your own decisions and pursue your own goals.