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The Collaborative International Dictionary

Drilling \Drill"ing\, n. [G. drillich, fr. L. trilix having three threads, fr. the of tres three + licium a thread of the warm. See Three, and cf. Twill.] (Manuf.) A heavy, twilled fabric of linen or cotton.


Drilling \Drill"ing\, n. The act of using a drill in sowing seeds.


Drilling \Drill"ing\, n.

  1. The act of piercing with a drill.

  2. A training by repeated exercises.


Drill \Drill\, v. t. [imp. & p. p. Drilled; p. pr. & vb. n. Drilling.] [D. drillen to bore, drill (soldiers); probably akin to AS. pyrlian, pyrelian, to pierce. See Thrill.]

  1. To pierce or bore with a drill, or a with a drill; to perforate; as, to drill a hole into a rock; to drill a piece of metal.

  2. To train in the military art; to exercise diligently, as soldiers, in military evolutions and exercises; hence, to instruct thoroughly in the rudiments of any art or branch of knowledge; to discipline.

    He [Frederic the Great] drilled his people, as he drilled his grenadiers. -- Macaulay.


Etymology 1 n. 1 Act of drill#Verbing. 2 A heavy, twilled fabric of linen or cotton; drill. vb. (present participle of drill English) Etymology 2

n. A long firearm with three (or rarely, four) barrels.

  1. n. the act of drilling [syn: boring]

  2. the act of drilling a hole in the earth in the hope of producing petroleum [syn: boring, oil production]


Drilling is a cutting process that uses a drill bit to cut a hole of circular cross-section in solid materials. The drill bit is usually a rotary cutting tool, often multipoint. The bit is pressed against the workpiece and rotated at rates from hundreds to thousands of revolutions per minute. This forces the cutting edge against the workpiece, cutting off chips (swarf) from the hole as it is drilled.

In rock drilling, the hole is usually not made through a circular cutting motion, though the bit is usually rotated. Instead, the hole is usually made by hammering a drill bit into the hole with quickly repeated short movements. The hammering action can be performed from outside of the hole ( top-hammer drill) or within the hole ( down-the-hole drill, DTH). Drills used for horizontal drilling are called drifter drills.

In rare cases, specially-shaped bits are used to cut holes of non-circular cross-section; a square cross-section is possible.

Drilling (disambiguation)

Drilling is the cutting of a hole into a solid.

Drilling may also refer to:

  • Boring (earth), cutting a hole into the earth
  • Combination gun, a multi-barreled firearm

Usage examples of "drilling".

He wrote me a very handsome letter after we took the Cacafuego, and he told me he was drilling the peasantry.

Below, Gryf would be standing in the group of prisoners near the drilling rig.

Life at the academy did not become easier for our portly friend, for despite drilling and the marching of his numerous demerits he grew no leaner, though he did seem to become both stronger and gain more endurance, both for physical exercise and the routine harassment that came with his girth.

Marty Lunk, drilling at the safe, turned to his companions as he heard the muffled report.

To ascertain the suitability of the Fioneriska rock formations for the storage of radio nuclides with decay half-lives in excess of one million years, as suggested, further deep drilling operations would be required.

Drillings were made to a depth of one km under the north flank of Ceraunius Tholus, in locations where the ground was 10-50 microkelvins warmer than the flank median.

The core drillings, the seismic tomography, the petrography and magnetometry and analytical chemistryall of the tools of physical geology he found interesting and was adept at using and interpreting, but at heart what he most liked was just walking in the territory with a hammer and a hand lens, looking at the terrain and picking up rocks.

She was still in her rooms, where Tryton had confined her while drilling him and testing him to see if he deserved her.

The new technology of radio had forced briskness and brevity on professional speakers, such as politicians, who were accustomed to orating on the stump for three hours at a stretch, and preachers, sometimes drilling words into their listeners at speeds that reached two hundred words a minute.

By bringing forward his field-pieces, and drilling the swamp thickets with grape, he succeeded in expelling Horry, and clearing the way for his column.

Tyler Drilling will be in the black again and Marcie will have a husband and a clear conscience.

Inger had located a root by microseismometry before attempting any drilling.

I was too busy drilling his wife into the routine of learning how to use the air compressor and the recompression chamber.

The letter was to the effect that all around Visalia, upon the ranches affected by the regrade of the Railroad, men were arming and drilling, and that the strength of the League in that quarter was undoubted.

Salvidienus was charged with drilling and training all recruits remorselessly while the army waited for Mark Antony to find it.