A drill is a power tool that's used for making narrow holes or sometimes for pushing screws into wood or other hard material. The word is also a verb to describe the action a drill performs. For example, a dentist might drill into your tooth if you have a cavity.

A carpenter's drill can be held in one hand, while an oil drill is a large rig that hollows out holes in rock through which oil can flow. To drill is to bore holes in a hard surface, and it's also to teach something by repeating facts over and over: "I hate math, because my teacher just drills multiplication tables." Drill has a Dutch root, drillen, "to bore a hole, turn around, or whirl."

Definitions of drill
  1. noun
    a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows)
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    auger, gimlet, screw auger, wimble
    hand tool for boring holes
    bore bit, borer, rock drill, stone drill
    a drill for penetrating rock
    brace and bit
    a drill consisting of a bit and a brace to hold and turn it
    breast drill
    a portable drill with a plate that is pressed against the chest to force the drill point into the work
    core drill
    a drill that removes a cylindrical core from the drill hole
    burr drill, dentist's drill
    a high speed drill that dentists use to cut into teeth
    hand drill, handheld drill
    a small portable drill held and operated by hand
    power drill
    a power tool for drilling holes into hard materials
    a drill that is used to shape or enlarge holes
    a drill for cutting circular holes around a center
    cross bit
    a rock drill having cruciform cutting edges; used in mining
    electric drill
    a rotating power drill powered by an electric motor
    pneumatic drill
    a power drill powered by compressed air
    star drill
    a steel rock drill with a star-shaped point that is used for making holes in stones or masonry; it is operated by hitting the end with a hammer while rotating it between blows
    straight flute, straight-fluted drill
    a rock drill with flutes that are straight
    type of:
    an implement used in the practice of a vocation
  2. noun
    systematic training by multiple repetitions
    synonyms: exercise, practice, practice session, recitation
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    fire drill
    an exercise intended to train people in duties and escape procedures to be followed in case of fire
    manual, manual of arms
    (military) a prescribed drill in handling a rifle
    military drill
    training in marching and the use of weapons
    (psychology) a form of practice; repetition of information (silently or aloud) in order to keep it in short-term memory
    dry run, rehearsal
    a practice session in preparation for a public performance (as of a play or speech or concert)
    brushup, review
    practice intended to polish performance or refresh the memory
    (American football) practice play between a football team's squads
    sparring with an imaginary opponent (for exercise or training)
    target practice
    practice in shooting at targets
    close-order drill
    (military) military drill of troops in standard marching (shoulder-to-shoulder)
    drill on a barracks square
    dress rehearsal
    a full uninterrupted rehearsal in costumes shortly before the first performance
    an uninterrupted rehearsal
    a first perfunctory rehearsal of a theatrical production in which actors read their lines from the script and move as directed
    rub up
    a review that refreshes your memory
    type of:
    grooming, preparation, training
    activity leading to skilled behavior
  3. noun
    (military) the training of soldiers to march (as in ceremonial parades) or to perform the manual of arms
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    type of:
    grooming, preparation, training
    activity leading to skilled behavior
  4. verb
    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”
    synonyms: bore
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    initiate drilling operations, as for petroleum
    drill in an opposite direction
    cut a hole with a trepan, as in surgery
    type of:
    separate with or as if with an instrument
  5. verb
    teach by repetition
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    beat in, drill in, hammer in, ram down
    teach by drills and repetition
    inculcate, infuse, instill
    teach and impress by frequent repetitions or admonitions
    instill (into a person) by constant repetition
    type of:
    instruct, learn, teach
    impart skills or knowledge to
  6. verb
    learn by repetition
    “We drilled French verbs every day”
    synonyms: exercise, practice, practise
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    type of:
    learn, read, study, take
    be a student of a certain subject
  7. verb
    undergo military training or do military exercises
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    type of:
    prepare, train
    undergo training or instruction in preparation for a particular role, function, or profession
  8. verb
    train in the military, e.g., in the use of weapons
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    type of:
    develop, educate, prepare, train
    create by training and teaching
  9. noun
    similar to the mandrill but smaller and less brightly colored
    synonyms: Mandrillus leucophaeus
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    type of:
    large terrestrial monkeys having doglike muzzles
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