1drill 
/ˈdrɪl/ noun
plural drills /ˈdrɪl/ noun 1 [count] : a tool used for making holes in hard substances
▪ an electric/power drill ▪ the dentist's drill — see picture at carpentry; see also pneumatic drill 2 a : an exercise done to practice military skills or procedures [count] ▪ During basic training, the recruits spent hours a day doing drills. ▪ a drill sergeant [=a sergeant who trains new soldiers] [noncount] (chiefly Brit) ▪ soldiers doing drill
b : a physical or mental activity that is done repeatedly in order to learn something, become more skillful, etc. [count] ▪ The students do vocabulary/multiplication drills every Monday. ▪ The players are doing their drills. [noncount] ▪ The students were taught by drill. — see also fire drill
▪ an electric/power drill ▪ the dentist's drill — see picture at carpentry; see also pneumatic drill
b : a physical or mental activity that is done repeatedly in order to learn something, become more skillful, etc. [count] ▪ The students do vocabulary/multiplication drills every Monday. ▪ The players are doing their drills. [noncount] ▪ The students were taught by drill. — see also fire drill
know the drill
informal : to know how something is done : to be familiar with a regular process, procedure, etc.
▪ You don't have to tell us what to do. We all know the drill by now.
▪ You don't have to tell us what to do. We all know the drill by now.
