<p><strong>Noun</strong></p><ul><li>a shaftlike tool with two or more cutting edges for making holes in firm materials, especially by rotation.</li><li>a tool, especially a hand tool, for holding and operating such a tool.</li><li>Military: training in formal marching or other precise military or naval movements.</li><li>an exercise in such training: gun drill.</li><li>any strict, methodical, repetitive, or mechanical training, instruction, or exercise: a spelling drill.</li><li>the correct or customary manner of proceeding.</li><li>Also called snail bore: a gastropod, Urosalpinx cinera, that bores holes in shellfish, as oysters.</li></ul><p><strong>Verb</strong></p><ul><li>to pierce or bore a hole in (something).</li><li>to make (a hole) by boring.</li><li>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.</li><li>to impart (knowledge) by strict training, discipline, or repetition.</li><li>to train or rehearse (a person or group) in a subject, discipline, etc., by guided repetition, quizzing, and other techniques.</li><li>to pierce or bore something with or as with a drill.</li><li>to penetrate deeply beneath the ground or the seafloor with specialized machinery to search for deposits or reservoirs of a natural substance: to drill for oil.</li><li>to go through exercise in military or other training.</li></ul><p><strong>Verb Phrase</strong></p><ul><li>Computers: to move through a hierarchical system in order to view data at a lower level, as to find a specific file or database record.</li><li>to access and examine something more thoroughly or in more detail: Now that you have the big picture, let’s drill down to some technical facts and statistics.</li></ul>