Definition of "one-and-done" in English

Noun

1. Something that is completed or accomplished only once, never to be done again.

2. A basketball player who plays college basketball for a single year and then declares for the NBA draft.

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

3. The act of a team making the postseason playoffs but losing the very first game played in it.

4. A family in which the parents decide to have only one child.