A 20-year-old is typically called an adult.
Legally, a person reaches adulthood at the age of 18 in most countries. This means they are considered responsible for their actions and have the right to vote, serve in the military, enter into contracts, and purchase alcohol and tobacco.
However, the term young adult is often used to describe people in their late teens and early twenties. This is because they are still transitioning into adulthood and may not yet have fully developed their sense of identity or independence.
Other terms that may be used to describe a 20-year-old include:
- Twentysomething
- Millennial (for those born between 1981 and 1996)
- Gen Z (for those born between 1997 and 2012)
The specific term used to describe a 20-year-old will depend on the context and the speaker's intent.