the acid test
Say it: the AS-id test /ði ˌæsɪd ˈtɛst/ · idiom
What “the acid test” means
The key test of whether something really works or is genuine.
More precisely: A decisive test that proves whether something really works or is genuine.
Example: “Launch day will be the acid test for the new servers.”
When to use it
When one demanding test will reveal whether something truly works. Common in work discussions, reviews and everyday judgements.
Similar words
litmus test, moment of truth, proof
Where it comes from
From testing gold with nitric acid, which dissolves lesser metals but not gold.
Quick check
A supposedly waterproof coat looks great indoors, but wearing it in heavy rain will be…
a trial run or the acid test?
Show the answer
the acid test
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