mindworkout
nounUK /ˈmaɪndˌwɜːkaʊt/
US /ˈmaɪndˌwɝːkaʊt/
A mindworkout is when you do hard thinking to make your brain stronger.
Solving the puzzle was a good mindworkout for the whole class.
OTHER MEANINGS
2. A set of mental exercises done to improve memory or focus.
She does a quick mindworkout every morning before school.
3. Any activity that makes you think hard and learn something new.
Learning chess turned out to be a fun mindworkout.
4. A difficult problem that tests your thinking skills.
That math question was a real mindworkout.