either-or format
nounUK /ˈaɪðər ɔː ˈfɔːmæt/
US /ˈiːðər ɔːr ˈfɔːrmæt/
A way of asking a question that gives you only two choices.
The quiz used an either-or format, so I had to pick true or false for each question.
OTHER MEANINGS
2. A style of writing or speaking that presents two opposite options.
The debate followed an either-or format: you are either with us or against us.
3. A computer input style where only one of two settings can be selected.
The settings menu uses an either-or format for turning the alarm on or off.
4. A test design where each item offers exactly two possible answers.
The teacher chose an either-or format for the vocabulary check to keep it quick.