1. a person who is no longer a teenager, typically in their early twenties
Usage: informal; not widely used in formal contexts

1. of, relating to, or characteristic of the period after the teenage years
Usage: informal

Examples

• She entered her postteen years and moved into her first apartment.
• The postteen demographic has different consumer preferences than teenagers.
• Many postteen adults are still figuring out their career paths.
• He was in his postteen phase when he decided to go back to school.
• Postteen life brought new responsibilities and independence.