Meaning of “drill” - Learner’s Dictionary

drill

noun uk us /drɪl/
TOOL [ C ]

a tool or machine for making holes in a hard substance:

an electric drill
FOR LEARNING [ C, U ]

a teaching method in which students repeat something several times to help them learn it:

We do lots of drills to practise pronunciation.
an emergency/fire, etc drill

an occasion when you practise what to do in an emergency/fire, etc

SOLDIERS [ C, U ]

an occasion when soldiers do training for marching

(Definition of “drill noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)