English definition of “drill”
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 › when you practise what to do in an emergency/fire, etc
SOLDIERS [C, U] › when soldiers do training for marching