CARDINAL SIN


Meaning of CARDINAL SIN in English

ˌcardinal ˈsin BrE AmE noun [countable]

1 . informal something bad or stupid that you must avoid doing:

politicians who commit the cardinal sin of ignoring public opinion

2 . a serious ↑ sin in the Christian religion

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.