acid test

1. 1.

   a rigorous or crucial appraisal

   Broaderappraisal

Questions about acid test

What does acid test mean?

acid test means "a rigorous or crucial appraisal".

Is acid test a common word?

acid test is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.