guard Definition in the Cambridge English Dictionary
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Definition of “guard” - English Dictionary

Definition of "guard" - American English Dictionary

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guardnoun [C]

 us   /ɡɑrd/
a ​person or ​group of ​people whose ​job it is to ​protect a ​person, ​place, or thing from ​danger or ​attack, or to ​prevent a ​person such as a ​criminal from ​escaping: prison guards Armed guards were ​posted at every ​exit. In ​sports, a guard is a ​player who ​supports and ​defends other ​players of his or her ​team.
(Definition of guard from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "guard" - British English Dictionary

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guardnoun [C]

uk   /ɡɑːd/  us   /ɡɑːrd/

guard noun [C] (PERSON WHO PROTECTS)

B1 a ​person or ​group of ​people whose ​job is to ​protect a ​person, ​place, or thing from ​danger or ​attack, or to ​prevent a ​person such as a ​criminal from ​escaping: prison guards security guards There are guards posted (= ​standing and ​watching) at every ​entrance. Armed guards are ​posted around the ​site. The ​frontier is ​patrolled by border guards.be under guard to be ​kept in a ​place by a ​group of ​people who have ​weapons: The ex-president was under armed guard in the ​palace.stand/keep guard (also be on guard) to be ​responsible for ​protecting someone or something, or for ​preventing someone from ​escaping: Two of the ​soldierskept guard over the ​capturedguns. Armed ​policestand guard ​outside the ​house.the changing of the guard a ​ceremonyheldoutside Buckingham Palace in London, where one set of ​soldiersreplaces the ​soldiers who have ​finishedtheirtime on ​dutystandingoutside the ​palace
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guard noun [C] (ON A TRAIN)

UK (US conductor) a ​railwayofficial who ​travels on and is ​responsible for a ​train

guard noun [C] (DEVICE)

a ​device that ​protects a ​dangerouspart of something or that ​protects something from getting ​damaged: a ​fire guard a ​trigger guard The ​helmet has a ​face guard ​attached.

guardverb [T]

uk   /ɡɑːd/  us   /ɡɑːrd/

guard verb [T] (WATCH)

B2 to ​protect someone or something from being ​attacked or ​stolen: Soldiers guard the ​maindoors of the ​embassy.B2 to ​watch someone and make ​certain they do not ​escape from a ​place: Five ​prisonofficers guarded the ​prisoners.
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guard verb [T] (NOT TELL)

to ​keepinformationsecret: Journalists jealously (= ​carefully) guard ​theirsources of ​information.
Phrasal verbs
(Definition of guard from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

Definition of "guard" - Business English Dictionary

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guardnoun [C]

uk   us   /ɡɑːd/
WORKPLACE a ​piece of ​equipment that ​protects the ​user of a ​machine from being ​injured by a ​sharp or dangerous ​part on the ​machine: Make sure that the ​safety guard is in ​position before using the ​cuttingmachine.
a ​person or ​group of ​people whose ​job is to ​protect a ​person, ​place or thing, or to prevent a ​person, such as a ​criminal, from escaping: a night guard at a ​bank border/prison/​security guards
be on your guard (against sth) to be careful to ​avoid being tricked or getting into a dangerous ​situation: Stores must always be on their guard against ​creditcardfraud.

guardverb [I or T]

uk   us   /ɡɑːd/
to ​protect something from being known, ​found, ​harmed, or taken: The California-based ​company is ​aggressively guarding its ​secrettechnology.guard (sth) against sth The ​firewall guards the ​computer against ​viruses or other harmful ​programs.
(Definition of guard from the Cambridge Business English Dictionary © Cambridge University Press)
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“guard” in Business English

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