Meaning of “if the worst comes to the worst” in the English Dictionary

british dictionary

"if the worst comes to the worst" in British English

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if the worst comes to the worst

UK US if worse/worst comes to worst

if the situation develops in the most serious or unpleasant way:

We should be in when you arrive, but if the worst comes to the worst, the neighbours have a spare key and will let you into the house.

(Definition of “if the worst comes to the worst” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"if the worst comes to the worst" in American English

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if the worst comes to the worst

also if worse comes to worst

if a bad situation becomes even worse:

If the worst comes to the worst, we can ask Dad to send us some more money.

(Definition of “if the worst comes to the worst” from the Cambridge Academic Content Dictionary © Cambridge University Press)