The Collaborative International Dictionary of English v.0.48:
Guard \Guard\, n. [OF. guarde, F. garde; of German origin; cf.
OHG. wart, warto, one who watches, warta a watching, Goth.
wardja watchman. See Guard, v. t.]
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1. One who, or that which, guards from injury, danger,
exposure, or attack; defense; protection.
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His greatness was no guard to bar heaven's shaft.
--Shak.
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2. A man, or body of men, stationed to protect or control a
person or position; a watch; a sentinel.
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The guard which kept the door of the king's house.
--Kings xiv.
27.
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3. One who has charge of a mail coach or a railway train; a
conductor. [Eng.]
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4. Any fixture or attachment designed to protect or secure
against injury, soiling, or defacement, theft or loss; as:
(a) That part of a sword hilt which protects the hand.
(b) Ornamental lace or hem protecting the edge of a
garment.
(c) A chain or cord for fastening a watch to one's person
or dress.
(d) A fence or rail to prevent falling from the deck of a
vessel.
(e) An extension of the deck of a vessel beyond the hull;
esp., in side-wheel steam vessels, the framework of
strong timbers, which curves out on each side beyond
the paddle wheel, and protects it and the shaft
against collision.
(f) A plate of metal, beneath the stock, or the lock
frame, of a gun or pistol, having a loop, called a
bow, to protect the trigger.
(g) (Bookbinding) An interleaved strip at the back, as in
a scrap book, to guard against its breaking when
filled.
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5. A posture of defense in fencing, and in bayonet and saber
exercise.
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6. An expression or admission intended to secure against
objections or censure.
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They have expressed themselves with as few guards
and restrictions as I. --Atterbury.
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7. Watch; heed; care; attention; as, to keep guard.
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8. (Zool.) The fibrous sheath which covers the phragmacone of
the Belemnites.
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Note: Guard is often used adjectively or in combination; as,
guard boat or guardboat; guardroom or guard room; guard
duty.
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Advanced guard, Coast guard, etc. See under Advanced,
Coast, etc.
Grand guard (Mil.), one of the posts of the second line
belonging to a system of advance posts of an army.
--Mahan.
Guard boat.
(a) A boat appointed to row the rounds among ships of war
in a harbor, to see that their officers keep a good
lookout.
(b) A boat used by harbor authorities to enforce the
observance of quarantine regulations.
Guard cells (Bot.), the bordering cells of stomates; they
are crescent-shaped and contain chlorophyll.
Guard chamber, a guardroom.
Guard detail (Mil.), men from a company regiment etc.,
detailed for guard duty.
Guard duty (Mil.), the duty of watching patrolling, etc.,
performed by a sentinel or sentinels.
Guard lock (Engin.), a tide lock at the mouth of a dock or
basin.
Guard of honor (Mil.), a guard appointed to receive or to
accompany eminent persons.
Guard rail (Railroads), a rail placed on the inside of a
main rail, on bridges, at switches, etc., as a safeguard
against derailment.
Guard ship, a war vessel appointed to superintend the
marine affairs in a harbor, and also, in the English
service, to receive seamen till they can be distributed
among their respective ships.
Life guard (Mil.), a body of select troops attending the
person of a prince or high officer.
Off one's guard, in a careless state; inattentive;
unsuspicious of danger.
On guard, serving in the capacity of a guard; doing duty as
a guard or sentinel; watching.
On one's guard, in a watchful state; alert; vigilant.
To mount guard (Mil.), to go on duty as a guard or
sentinel.
To run the guard, to pass the watch or sentinel without
leave.
Syn: Defense; shield; protection; safeguard; convoy; escort;
care; attention; watch; heed.
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The Collaborative International Dictionary of English v.0.48:
Coast \Coast\ (k[=o]st), n. [OF. coste, F. c[^o]te, rib, hill,
shore, coast, L. costa rib, side. Cf. Accost, v. t.,
Cutlet.]
1. The side of a thing. [Obs.] --Sir I. Newton.
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2. The exterior line, limit, or border of a country; frontier
border. [Obs.]
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From the river, the river Euphrates, even to the
uttermost sea, shall your coast be. --Deut. xi.
24.
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3. The seashore, or land near it.
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He sees in English ships the Holland coast.
--Dryden.
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We the Arabian coast do know
At distance, when the species blow. --Waller.
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The coast is clear, the danger is over; no enemy in sight.
--Dryden. Fig.: There are no obstacles. "Seeing that the
coast was clear, Zelmane dismissed Musidorus." --Sir P.
Sidney.
Coast guard.
(a) A body of men originally employed along the coast to
prevent smuggling; now, under the control of the
admiralty, drilled as a naval reserve. [Eng.]
(b) The force employed in life-saving stations along the
seacoast. [U. S.]
Coast rat (Zool.), a South African mammal (Bathyergus
suillus), about the size of a rabbit, remarkable for its
extensive burrows; -- called also sand mole.
Coast waiter, a customhouse officer who superintends the
landing or shipping of goods for the coast trade. [Eng.]
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Moby Thesaurus II by Grady Ward, 1.0:
53 Moby Thesaurus words for "coast guard":
Naval Construction Battalion, RN, Royal Navy, Seabees, USN,
United States Navy, advance guard, air-sea rescue, argosy, armada,
armed guard, bank guard, cordon, cordon sanitaire, division,
escadrille, fleet, flotilla, garrison, goalie, goalkeeper,
goaltender, guard, guarder, guardsman, inlying picket, jailer,
lifeboat, lifeguard, lifesaver, marine, merchant fleet,
merchant marine, merchant navy, mosquito fleet, naval forces,
naval militia, naval reserve, navy, outguard, outpost, picket,
rear guard, rescuer, savior, security guard, squadron, task force,
task group, train guard, van, vanguard, warder