guard /ˈgɑrd/
 守衛者,警戒,護衛隊,防護裝置(vt.)保衛,看守,當心(vi.)防止,警惕,警衛


 guard
 防護


 Guard v. t. [imp. & p. p. Guarded; p. pr. & vb. n. Gurding.]
 1. To protect from danger; to secure against surprise, attack, or injury; to keep in safety; to defend; to shelter; to shield from surprise or attack; to protect by attendance; to accompany for protection; to care for.
    For Heaven still guards the right.   --Shak.
 2. To keep watch over, in order to prevent escape or restrain from acts of violence, or the like.
 3. To protect the edge of, esp. with an ornamental border; hence, to face or ornament with lists, laces, etc.
    The body of your discourse is sometime guarded with fragments, and the guards are but slightly basted on neither.   --Shak.
 4. To fasten by binding; to gird. [Obs.]
 Syn: -- To defend; protect; shield; keep; watch.


 Guard v. i. To watch by way of caution or defense; to be cautious; to be in a state or position of defense or safety; as, careful persons guard against mistakes.


 Guard, n.
 1. One who, or that which, guards from injury, danger, exposure, or attack; defense; protection.
    His greatness was no guard to bar heaven's shaft.   --Shak.
 2. A man, or body of men, stationed to protect or control a person or position; a watch; a sentinel.
    The guard which kept the door of the king's house.   --Kings xiv. 27.
 3. One who has charge of a mail coach or a railway train; a conductor. [Eng.]
 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.
 5. A posture of defense in fencing, and in bayonet and saber exercise.
 6. An expression or admission intended to secure against objections or censure.
    They have expressed themselves with as few guards and restrictions as I.   --Atterbury.
 7. Watch; heed; care; attention; as, to keep guard.
 8. Zool. The fibrous sheath which covers the phragmacone of the Belemnites.
 Note: ☞ Guard is often used adjectively or in combination; as, guard boat or guardboat; guardroom or guard room; guard duty.
 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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 guard
      n 1: a person who keeps watch over something or someone
      2: the person who plays that position on a football team; "the
         left guard was injured on the play"
      3: a device designed to prevent injury [syn: safety, {safety
         device]
      4: a posture of defence in boxing or fencing; "keep your guard
         up"
      5: the person who plays the position of guard on a basketball
         team
      6: a group of men who escort and protect some important person
         [syn: bodyguard]
      7: a precautionary measure warding off impending danger or
         damage or injury etc.; "he put an ice pack on the injury
         as a precaution"; "an insurance policy is a good
         safeguard"; "we let our guard down" [syn: precaution, safeguard]
      8: the duty of serving as a sentry; "he was on guard that
         night" [syn: guard duty, sentry duty, sentry go]
      9: a position on the line of scrimmage; "guards must be good
         blockers"
      10: a position on a basketball team
      v 1: to keep watch over; "there would be men guarding the horses"
      2: watch over or shield from danger or harm; protect; "guard my
         possessions while I'm away" [syn: ward]
      3: protect against a challenge or attack; "Hold that position
         behind the trees!"; "Hold the bridge against the enemy's
         attacks" [syn: defend, hold]
      4: take precautions in order to avoid some unwanted
         consequence; "guard against becoming too friendly with the
         staff"; "guard against infection"


 Guard
    (1.) Heb. tabbah (properly a "cook," and in a secondary sense
    "executioner," because this office fell to the lot of the cook
    in Eastern countries), the bodyguard of the kings of Egypt (Gen.
    37:36) and Babylon (2 Kings 25:8; Jer. 40:1; Dan. 2:14).

      (2.) Heb. rats, properly a "courier," one whose office was to
    run before the king's chariot (2 Sam. 15:1; 1 Kings 1:5). The
    couriers were also military guards (1 Sam. 22:17; 2 Kings
    10:25). They were probably the same who under David were called
    Pelethites (1 Kings 14:27; 2 Sam. 15:1).

      (3.) Heb. mishmereth, one who watches (Neh. 4:22), or a
    watch-station (7:3; 12:9; Job 7:12).

      In the New Testament (Mark 6:27) the Authorized Version
    renders the Greek _spekulator_ by "executioner," earlier English
    versions by "hangman," the Revised Version by "soldier of his
    guard." The word properly means a "pikeman" or "halberdier," of
    whom the bodyguard of kings and princes was composed. In Matt.
    27:65, 66; 28:11, the Authorized Version renders the Greek
    _kustodia_ by "watch," and the Revised Version by "guard," the
    Roman guard, which consisted of four soldiers, who were relieved
    every three hours (Acts 12:4). The "captain of the guard"
    mentioned Acts 28:16 was the commander of the Praetorian troops,
    whose duty it was to receive and take charge of all prisoners
    from the provinces.