The word "heaven knows" in English means: Used to emphasize that you do not know something or that something is surprising., Used to express surprise, shock, or frustration..
The phonetic transcription of "heaven knows" is /ˌhevən ˈnəʊz/ in British English and /ˌhevən ˈnoʊz/ in American English. Click the 🔊 button to hear both pronunciations.
Synonyms for "heaven knows": goodness knows, lord knows.
Example usage of "heaven knows": "Heaven knows what happened to my keys, I can't find them.". More examples on the page.