- the part of a swimming pool where the water is deepest
- You wouldn't jump in the deep end of the pool before you know how to swim.
Idioms
go off the deep end
- (informal) to suddenly become very angry or emotional
jump/be thrown in at the deep end
- (informal) to start or be made to start a new and difficult activity that you are not prepared for
- Junior hospital doctors are thrown in at the deep end in their first jobs.
- The company believes in throwing new employees in at the deep end with no training.
Check pronunciation:
deep end