The term "18-20" typically refers to the age range of individuals who are between 18 and 20 years old. This period is significant as it marks the transition from adolescence to adulthood. People in this age group often experience increased independence, such as moving out of their parents' homes, starting college, or entering the workforce. In many countries, turning 18 is associated with legal adulthood, allowing individuals to vote, sign contracts, and make other important decisions. However, some rights, such as drinking alcohol, may not be granted until age 21, highlighting the gradual nature of adult responsibilities and privileges.