one-choice rule
nounUK /wʌn tʃɔɪs ruːl/
US /wʌn tʃɔɪs ruːl/
A one-choice rule means you can pick only one thing.
The game has a one-choice rule, so you can only pick one card.
OTHER MEANINGS
2. A rule that allows only one answer on a test or form.
The quiz follows a one-choice rule, so circle just one answer.
3. A policy that gives a person only one possible action.
Under the one-choice rule, the team could only take the bus.
4. A design rule where a menu shows only one selectable item.
The app uses a one-choice rule to keep the screen simple.