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Machinery, Building Trades.��

1. a shaftlike tool with two or more cutting edges for making holes in firm materials, especially by rotation.

2. a tool, especially a hand tool, for holding and operating such a tool.

Military.��

1. training in formal marching or other precise military or naval movements.

2. an exercise in such training.

   gun drill.

any strict, methodical, repetitive, or mechanical training, instruction, or exercise.

the correct or customary manner of proceeding.

Also called snail bore.��a gastropod, Urosalpinx cinera, that bores holes in shellfish, as oysters.

to pierce or bore a hole in (something).

to make (a hole) by boring.

Military.��to instruct and exercise (military trainees) in formation marching and movement, in the carrying of arms during formal marching, and in the formal handling of arms for ceremonies and guard duty.

to impart (knowledge) by strict training, discipline, or repetition.

to train or rehearse (a person or group) in a subject, discipline, etc., by guided repetition, quizzing, and other techniques.

to pierce or bore something with or as with a drill.

to penetrate deeply beneath the ground or the seafloor with specialized machinery to search for deposits or reservoirs of a natural substance.

to go through exercise in military or other training.

a small furrow made in the soil in which to sow seeds.

a row of seeds or plants thus sown.

a machine for sowing in rows and for covering the seeds when sown.

to sow (seed) in drills.

to sow or plant (soil, a plot of ground, etc.) in drills.