mob Meaning in the Cambridge English Dictionary
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Meaning of “mob” in the English Dictionary

"mob" in British English

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mobnoun [+ sing/pl verb]

uk   /mɒb/  us   /mɑːb/
[C] usually disapproving a ​large, ​angrycrowd, ​especially one that could ​easilybecomeviolent: The angry mob ​outside the ​jail was/were ​ready to ​riot. a lynch mob 50 ​people were ​killed in three ​days of mob violence. [C] informal a ​group of ​people who are ​friends or who are ​similar in some way: The ​usual mob was/were ​hanging out at the ​bar. [S] informal an ​organization of ​criminals: a New York mob ​leader
See also

mobverb [T]

uk   /mɒb/  us   /mɑːb/ (-bb-)
[T usually passive] to come together around someone in a ​crowd to ​expressadmiration, ​interest, or ​anger: They were mobbed byfans when they ​arrived at the ​theatre. Let's not go to that ​bartonight - it's always mobbed (= there are always a lot of ​people there) on Fridays. [I or T] When ​birds or ​smallanimals mob a ​bigger or more ​frighteningbird or ​animal that is ​hunting them, they ​attack it together and ​force it to go away.
(Definition of mob from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"mob" in American English

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mobnoun [C]

 us   /mɑb/
a ​largegroup of ​peoplegathered together who are often ​uncontrollable or ​violent: He ​arrived at the ​airport to ​find a mob of ​adoringfanswaiting for him. The mob is also an ​organization of ​criminals, esp. the Mafia .

mobverb [T]

 us   /mɑb/ (-bb-)
to ​gather in a ​largegroup around someone to ​expressadmiration, ​interest, or ​anger: She was mobbed by her ​fans. The ​stores are always mobbed (= very ​crowded) on ​Saturdays.
(Definition of mob from the Cambridge Academic Content Dictionary © Cambridge University Press)
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