\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.

\Drill\, v. i.
To practice an exercise or exercises; to train one's self.

\Drill\, n.
1. An instrument with an edged or pointed end used for making
   holes in hard substances; strictly, a tool that cuts with
   its end, by revolving, as in drilling metals, or by a
   succession of blows, as in drilling stone; also, a drill
   press.
2. (Mil.) The act or exercise of training soldiers in the
   military art, as in the manual of arms, in the execution
   of evolutions, and the like; hence, diligent and strict
   instruction and exercise in the rudiments and methods of
   any business; a kind or method of military exercises; as,
   infantry drill; battalion drill; artillery drill.
3. Any exercise, physical or mental, enforced with regularity
   and by constant repetition; as, a severe drill in Latin
   grammar.
4. (Zo["o]l.) A marine gastropod, of several species, which
   kills oysters and other bivalves by drilling holes through
   the shell. The most destructive kind is {Urosalpinx
   cinerea}.
{Bow drill}, {Breast drill}. See under {Bow}, {Breast}.
{Cotter drill}, or {Traverse drill}, a machine tool for
   drilling slots.
{Diamond drill}. See under {Diamond}.
{Drill jig}. See under {Jig}.
{Drill pin}, the pin in a lock which enters the hollow stem
   of the key.
{Drill sergeant} (Mil.), a noncommissioned officer whose
   office it is to instruct soldiers as to their duties, and
   to train them to military exercises and evolutions.
{Vertical drill}, a drill press.

\Drill\, v. t. [Cf. {Trill} to trickle, {Trickle},
{Dribble}, and W. rhillio to put in a row, drill.]
1. To cause to flow in drills or rills or by trickling; to
   drain by trickling; as, waters drilled through a sandy
   stratum. [R.] --Thomson.
2. To sow, as seeds, by dribbling them along a furrow or in a
   row, like a trickling rill of water.
3. To entice; to allure from step; to decoy; -- with on.
   [Obs.]
         See drilled him on to five-fifty.     -- Addison.
4. To cause to slip or waste away by degrees. [Obs.]
         This accident hath drilled away the whole summer. --
                                               Swift.

\Drill\, v. i.
1. To trickle. [Obs. or R.] --Sandys.
2. To sow in drills.

\Drill\, n.
1. A small trickling stream; a rill. [Obs.]
         Springs through the pleasant meadows pour their
         drills.                               --Sandys.
2. (Agr.)
   (a) An implement for making holes for sowing seed, and
       sometimes so formed as to contain seeds and drop them
       into the hole made.
   (b) A light furrow or channel made to put seed into
       sowing.
   (c) A row of seed sown in a furrow.
Note: Drill is used adjectively, or as the first part of a
      compound; as, drill barrow or drill-barrow; drill
      husbandry; drill plow or drill-plow.
{Drill barrow}, a wheeled implement for planting seed in
   drills.
{Drill bow}, a small bow used for the purpose of rapidly
   turning a drill around which the bowstring takes a turn.
{Drill harrow}, a harrow used for stirring the ground between
   rows, or drills.
{Drill plow}, or {Drill plough}, a sort plow for sowing grain
   in drills.

\Drill\, n. [Cf. {Mandrill}.] (Zo["o]l.)
A large African baboon ({Cynocephalus leucoph[ae]us}).

\Drill\, n. [Usually in pl.] (Manuf.)
Same as {Drilling}.
{Imperial drill}, a linen fabric having two threads in the
   warp and three in the filling.