"drills" in the noun sense
1. drill
a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows)
2. drill, Mandrillus leucophaeus
similar to the mandrill but smaller and less brightly colored
3. exercise, practice, drill, practice session, recitation
systematic training by multiple repetitions
"practice makes perfect"
4. drill
military) the training of soldiers to march (as in ceremonial parades) or to perform the manual of arms
"drills" in the verb sense
1. bore, drill
make a hole, especially with a pointed power or hand tool
"don't drill here, there's a gas pipe"
"drill a hole into the wall"
"drill for oil"
"carpenter bees are boring holes into the wall"
2. drill
train in the military, e.g., in the use of weapons
3. drill, exercise, practice, practise
learn by repetition
"We drilled French verbs every day"
"Pianists practice scales"
4. drill
teach by repetition
5. drill
undergo military training or do military exercises
Source: WordNet® (An amazing lexical database of English)
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