Meaning of “shibboleth” in the English Dictionary

british dictionary

"shibboleth" in British English

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shibbolethnoun [ C ]

uk /ˈʃɪb.əl.eθ/ us /ˈʃɪb.əl.eθ/

formal a belief or custom that is not now considered as important and correct as it was in the past:

They still cling to many of the old shibboleths of education.

a word, phrase, custom, etc., only known to a particular group of people, that you can use to prove to them that you are a real member of that group

(Definition of “shibboleth” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)