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English definition of “guard”

guard

noun [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 soldiers kept guard over the captured guns. Armed police stand guard outside the house. the changing of the guard a ceremony held outside Buckingham Palace in London when one set of soldiers replaces the soldiers who have finished their time on duty standing outside the palace

guard noun [C] (ON A TRAIN)

UK (US conductor) a railway official who travels on and is responsible for a train

guard noun [C] (DEVICE)

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

guard

verb [T] uk   /ɡɑːd/ us    /ɡɑːrd/

guard verb [T] (WATCH)

B2 to protect someone or something from being attacked or stolen: Soldiers guard the main doors of the embassy. B2 to watch someone and make certain they do not escape from a place: Five prison officers guarded the prisoners.

guard verb [T] (NOT TELL)

to keep information secret: Journalists jealously (= carefully) guard their sources of information.
Phrasal verbs
(Definition of guard from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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