Tra từ guard - Từ điển Oxford Advanced Learner 8th

guard [guard guards guarded guarding] noun, verb BrE [ɡɑːd] NAmE [ɡɑːrd]
noun

PEOPLE WHO PROTECT
1. countable a person, such as a soldier, a police officer or a prison officer, who protects a place or people, or prevents prisoners from escaping
•a security guard
•border guard s
• The prisoner slipped past the guards on the gate and escaped.
• A guard was posted outside the building.
compare ↑warder
see also ↑bodyguard, ↑coastguard, ↑lifeguard
2. countable + singular or plural verb a group of people, such as soldiers or police officers, who protect sb/sth
•the captain of the guard
•the changing of the guard (= when one group replaces another)
•The guard is/are being inspected today.
•Fellow airmen provided a guard of honour at his wedding.
•The President always travels with an armed guard.
see also ↑National Guard, ↑old guard, ↑rearguard
3. uncountable the act or duty of protecting property, places or people from attack or danger; the act or duty of preventing prisoners from escaping
•a sentry on guard (= at his or her post, on duty)
•to do guard duty
• The escaped prisoner was brought back under armed guard.
• The terrorist was kept under police guard.
•One of the men kept guard, while the other broke into the house.
4. the Guardsplural (in Britain and some other countries) special ↑regiments of soldiers whose original duty was to protect the king or queen
•the Scots Guards
•a Guards officer

AGAINST INJURY
5. countable (often in compounds)something that covers a part of a person's body or a dangerous part of a machine to prevent injury
• Ensure the guard is in place before operating the machine.
see also ↑fireguard, ↑mouthguard, ↑mudguard, ↑safeguard, ↑shin guard

ON TRAIN
6. countable (BrE, becoming old-fashioned) = ↑conductor (²)

IN BOXING/FENCING
7. uncountable a position you take to defend yourself, especially in a sport such as ↑boxing or ↑fencing
•to drop/keep up your guard
• (figurative) In spite of the awkward questions the minister never let his guard fall for a moment.

IN BASKETBALL
8. countable one of the two players on a ↑basketball team who are mainly responsible for staying close to opposing players to stop them from scoring

IN AMERICAN FOOTBALL
9. countable one of the two players on an ↑American football team who play either side of the ↑centre forward

Word Origin:
late Middle English (in the sense ‘care, custody’): from Old French garde (noun), garder (verb), of West Germanic origin. Compare with ↑ward.

Thesaurus:
guard noun
1. C
•A guard was posted outside the building.
sentry • • bodyguard • • lookout • |especially BrE minder •
a/an armed/uniformed guard/bodyguard
stand guard/sentry
post a guard/sentry/lookout
2. U
•He fell asleep on guard duty.
watch • • alert • • vigil •
on guard/watch/alert
keep guard/watch/a vigil
mount (a) guard/watch

Example Bank:
•Fellow soldiers formed a guard of honour/honor at his wedding.
•Fellow soldiers from Corporal Smith's regiment formed a guard of honour at his wedding.
•Guards had been posted all around the TV studio.
•Guards patrolled the perimeter fence.
•He arrived under heavy guard.
•He caught me completely off guard.
•He was always on his guard against moneymaking schemes.
•It would only be a matter of minutes before the alarm was raised and the guard called out.
•Matt relaxed a little, dropping his guard.
•No one can keep their guard up all the time.
•Several police officers were on guard outside the factory.
•Soldiers stood guard on the city gates.
•The accused was taken to court under armed guard.
•The building is protected by armed guards.
•The guard was changed every two hours.
•The prisoners were under close guard.
•The question seemed to catch him off his guard.
•Two police officers kept guard over the burned-out building.
•Would you like me to keep guard of your room?
•A group of tourists was watching the changing of the guard outside the palace.
•He fell asleep on guard duty.
•One of the men kept guard, while the other broke into the house.
•She saw the security guards wrestle him to the ground.
•The President always travels with an armed guard.
•The border guard checked our papers before waving us through.
•The escaped prisoner was brought back under armed guard.
•The suspects were kept under police guard.
•Two sentries stood on guard.
Idioms: ↑keep guard ▪ ↑off guard ▪ ↑on your guard
Derived: ↑guard against something

verb
1. ~ sb/sth to protect property, places or people from attack or danger
• The dog was guarding its owner's luggage.
•political leaders guarded by the police
• You can't get in; the whole place is guarded.
• (figurative)a closely guarded secret
2. ~ sb to prevent prisoners from escaping
• The prisoners were guarded by soldiers.
Verb forms:

Word Origin:
late Middle English (in the sense ‘care, custody’): from Old French garde (noun), garder (verb), of West Germanic origin. Compare with ↑ward.

Thesaurus:
guard verb T
•Police guarded the palace.
protect • • defend • • shield • • shelter • • secure • • preserve • |formal safeguard •
guard/protect/defend/shield/shelter/secure/preserve/safeguard sb/sth from sth
guard/protect/defend/secure/safeguard sth against sth
heavily guarded/protected/defended

Example Bank:
•He was under instructions to guard the key with his life.
•She jealously guarded her position of power.
•The military base is closely guarded.
•The mountain pass is well guarded.
•They guard the city against attack.
•a bird carefully guarding its eggs
•pop stars who need to be guarded from their fans
•strictly guarded privacy
•tightly guarded privacy
•Delegates at the conference were guarded by the police.
•The dog was guarding its owner's luggage.
•The recipe is a closely guarded secret.
•You can't get in; the whole place is guarded.