Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “guard”


noun [C] (PERSON WHO PROTECTS)    /ɡɑːd/ US  /ɡɑːrd/
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.Protection and protectorsEnvironmental issues 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 .Defending and protectingBacking, supporting and defendingPreserving and saving 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 .Defending and protectingBacking, supporting and defendingPreserving and saving 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 Military training and ceremonies
(Definition of guard noun (PERSON WHO PROTECTS) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of guard

Definitions of “guard” in other dictionaries

Word of the Day

best man

a male friend or relation of the bridegroom who stands with him and helps him during a marriage ceremony

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More