The word "back out" in English means: To decide that you are not going to do something that you had agreed to do., To move a vehicle backwards..
The phonetic transcription of "back out" is /ˌbæk ˈaʊt/ in British English and /ˌbæk ˈaʊt/ in American English. Click the 🔊 button to hear both pronunciations.
Synonyms for "back out": retreat, abandon, cancel, reverse, withdraw.
Example usage of "back out": "I can't back out now I have promised to help.". More examples on the page.