yes-or-nodecision
nounUK /ˌjes ɔː ˈnəʊ dɪˌsɪʒən/
US /ˌjes ɔːr ˈnoʊ dɪˌsɪʒən/
A yes-or-no decision is a choice where you can only pick one of two answers.
Choosing whether to bring an umbrella was a yes-or-no decision.
OTHER MEANINGS
2. A question that can only be answered with yes or no.
The teacher asked a yes-or-no decision question about the field trip.
3. A quick choice made without thinking about many options.
Picking a snack was a yes-or-no decision for him.
4. A situation where there is no middle answer.
For the game, joining the team was a yes-or-no decision.