drill¹ /dril/

1. To bore, pierce
2. To make with a drill
3. To pierce with a bullet or bullets (slang)
4. To exercise (soldiers, pupils, etc) by repeated practice
5. To sow in rows

1. An instrument for boring stone, metal, teeth, or other hard substances
2. A large boring instrument used in mining, etc
3. A type of shellfish that bores into the shells of oysters
4. A training exercise, or a session of it
5. A drill-master
6. A ridge with seed or growing plants on it (esp vegetables such as turnips, potatoes, etc)
7. The plants in such a row
8. The machine for sowing the seed
9. Correct procedure or routine (informal)

drillˈer noun

drillˈ-barrow noun

A grain-drill driven by hand

drill bit noun

A removable cutting and boring head in a drill

drillˈ-harrow noun

A harrow for working between drills

drillˈhole noun

A hole bored in the ground eg for rock samples

drillˈ-husbandry noun

The method of sowing seed in drills or rows

drilling machine, drilling lathe or drillˈ-press noun

A machine for boring with a drill or drills

drilling mud noun

A mixture of clays, water, density-increasing agents and sometimes thixotropic agents pumped down through the drilling pipe and used to cool, lubricate and flush debris from the drilling assembly, providing the hydrostatic pressure to contain the oil and gas when this is reached

drilling pipe noun

The tube that connects the drilling platform to the drill bit and imparts rotary motion to the latter

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