Meaning of “pre-school” - Learner’s Dictionary

pre-school

adjective [ always before noun ] uk us /ˈpriːskuːl/

relating to children who are too young to go to school:

pre-school children/education
pre-school noun [ C ]

a school for children younger than five years old

(Definition of “pre-school” from the Cambridge Learner’s Dictionary © Cambridge University Press)