drill

1 drill /ˈdrɪl/ noun
plural drills
1 drill
/ˈdrɪl/
noun
plural drills
Britannica Dictionary definition of DRILL
1 
[count] : a tool used for making holes in hard substances — see picture at carpentry; see also pneumatic drill
2 
a  : an exercise done to practice military skills or procedures
[count]
[noncount]
(chiefly Brit)
b  : a physical or mental activity that is done repeatedly in order to learn something, become more skillful, etc.
[count]
[noncount]
— see also fire drill

know the drill

informal
: to know how something is done : to be familiar with a regular process, procedure, etc.
2 drill /ˈdrɪl/ verb
drills; drilled; drilling
2 drill
/ˈdrɪl/
verb
drills; drilled; drilling
Britannica Dictionary definition of DRILL
1 
: to make a hole in something with a drill
[+ object]
[no object]
2 
[+ object]
a  : to teach or train (someone) by repeating a lesson or exercise again and again
b  : to train (soldiers) by making them practice military procedures and exercises
3 
[+ object] US, sports, informal : to hit (someone or something) very hard

drill into

[phrasal verb]
drill (something) into (someone)
: to force (something) to be learned very well by (someone) by repeating it again and again

— driller

noun, plural drillers [count]
3 drill /ˈdrɪl/ noun
plural drills
3 drill
/ˈdrɪl/
noun
plural drills
Britannica Dictionary definition of DRILL
[count]
1 
: a row of seeds planted by a special machine
2 
: a special machine that plants seeds in rows
4 drill /ˈdrɪl/ verb
drills; drilled; drilling
4 drill
/ˈdrɪl/
verb
drills; drilled; drilling
Britannica Dictionary definition of DRILL
[+ object]
: to plant (seeds) in a row with a special machine
5 drill /ˈdrɪl/ noun
5 drill
/ˈdrɪl/
noun
Britannica Dictionary definition of DRILL
[noncount]
: a type of strong cotton cloth