Meaning of “God only knows” in the English Dictionary

american-english dictionary

"God only knows" in British English

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God only knows

informal it is impossible to say:

God only knows how he managed to find out where I live.

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

"God only knows" in American English

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God only knows

infml it is impossible to say:

God only knows how he managed to find out where I lived.

(Definition of “God only knows” from the Cambridge Academic Content Dictionary © Cambridge University Press)