Meaning of one-and-done | Babel Free

Definitions

1. Something that is completed or accomplished only once, never to be done again.
   idiomatic, informal
2. A basketball player who plays college basketball for a single year and then declares for the NBA draft.
   slang
3. The act of a team making the postseason playoffs but losing the very first game played in it.
   US, informal
4. A family in which the parents decide to have only one child.

Examples

“John Calipari's Kentucky squad was made up of one-and-done players.”

CEFR level