Longman Dictionary of Contemporary English homepage

unthinkable

adjective
     
un‧think‧a‧ble
1 impossible to accept or imagine:
It is unthinkable that a mistake like this could have happened.
it would be unthinkable for somebody to do something
It would be unthinkable for me to stay anywhere but with the family.
2

the unthinkable

something that is impossible to accept or imagine:
Then the unthinkable happened and the boat started to sink.
It was the job of the committee to think the unthinkable (=plan for unexpected events or situations).

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary