The Idiom Attic - a collection of hundreds of English idioms, each one explained.
The meaning of "the acid test"
" The acid test "
Meaning:
1. A scientific test to distinguish between gold and base metals. 2. A conclusive test to determine the validity of a claim.
Example:
1. We found a mineral that looked valuable but it might be fools gold - we need to give it the acid test. 2. The acid test of the quality of a singer is to ask them to sing unaccompanied.
