Adulthood, the period in the human lifespan in which full physical and intellectual maturity have been attained. Adulthood is commonly thought of as beginning at age 20 or 21 years. Middle age, commencing at about 40 years, is followed by old age at about 60 years.
Biologically, an adult is a human or other organism that has reached sexual maturity. In human The typical age of attaining legal adulthood is 18, although definition may vary by legal rights and country. Human adulthood encompasses.
adulthood definition: 1. the part of someone's life when they are an adult: 2. the state of being an adult. Learn more.
adulthood. When you stop growing and start shaving, you are in adulthood — a point where you reach maturity. Unfortunately, physical adulthood does not.