Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “guard”

See all translations

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, where one set of soldiers replaces the soldiers who have finished their time on duty standing outside the palace
More examples

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.
More examples

guard verb [T] (NOT TELL)

Phrasal verbs
(Definition of guard from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of guard?
Add Cambridge dictionaries to your browser to your website

Definitions of “guard” in other dictionaries

Word of the Day

work out

to exercise in order to improve the strength or appearance of your body

Word of the Day

Byronic, Orwellian and Darwinian: adjectives from names.

by Liz Walter,
April 15, 2015
Becoming an adjective is a strange kind of memorial, but it is often a sign of a person having had real influence on the world. Science is full of examples, from Hippocrates, the Greek medic born around 460 BC, who gave his name to the Hippocratic Oath still used by doctors today,

Read More 

bio-inspiration noun

April 13, 2015
the adoption of patterns and structures found in nature for the purposes of engineering, manufacturing, science, etc. The MIT researchers actually aren’t the only robotics team to turn to cheetahs for bio-inspiration.

Read More