An "adult" is a person who has reached the age of maturity, typically defined as 18 years or older in many countries. At this stage, individuals are legally recognized as responsible for their actions and can make decisions regarding their lives, such as voting, signing contracts, and entering into legal agreements. In addition to legal definitions, adulthood often involves taking on responsibilities like employment, financial independence, and possibly raising a family. Adults may also experience various life stages, including young adulthood, middle age, and senior years, each with its own challenges and opportunities for personal growth.