Definition of change-up in English:

change-up

Syllabification: change-up
Pronunciation: /ˈCHānjˌəp
 
/

noun

Baseball
A deceptively slow pitch intended to throw off the batter’s timing.
More example sentences
  • Both pitchers throw a fastball, curveball, and a change-up.
  • But I learned that I needed a change-up and that's been a big pitch for me.
  • His curveball doesn't drop much, his change-up stays pretty flat, and he has next to no movement on his ‘fastball.’

Definition of change-up in: