litmus test: meaning, definition, pronunciation and examples
C1Formal, academic, journalistic, business
Quick answer
What does “litmus test” mean?
A simple, decisive test that produces a clear yes/no or pass/fail result based on a single, crucial factor.
Audio
Pronunciation
Definition
Meaning and Definition
A simple, decisive test that produces a clear yes/no or pass/fail result based on a single, crucial factor.
A situation, question, or event that reveals the true nature or quality of someone or something, serving as a critical indicator for a larger principle.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. The term is equally common in both varieties.
Connotations
Connotes scientific rigour, clarity, and decisiveness. It can sometimes imply oversimplification of a complex issue.
Frequency
High frequency in political, scientific, and business commentary in both regions.
Grammar
How to Use “litmus test” in a Sentence
X is a litmus test for YX serves as the litmus test of Yto use X as a litmus testVocabulary
Collocations
Examples
Examples of “litmus test” in a Sentence
verb
British English
- The policy was litmus-tested against public opinion.
American English
- We need to litmus-test this proposal with our focus groups.
adjective
British English
- The referendum is a litmus-test issue for the government.
American English
- They faced a litmus-test question during the interview.
Usage
Meaning in Context
Business
Market reaction to the new product will be the litmus test for the company's future strategy.
Academic
The reproducibility of the experiment's results is the litmus test for its scientific validity.
Everyday
For many, a candidate's stance on healthcare is the litmus test for their vote.
Technical
In chemistry, litmus paper turning red is the classic litmus test for acidity.
Watch out
Common Mistakes When Using “litmus test”
- Using it for multi-faceted or gradual assessments (e.g., 'The litmus test for a good employee involves many skills' – incorrect). Confusing it with 'benchmark', which implies a standard for comparison, not a pass/fail trigger.
FAQ
Frequently Asked Questions
Yes, it is most common in formal, academic, journalistic, and professional contexts, though it is understood in general usage.
It originates from chemistry, where litmus paper is used to test whether a solution is acidic (turns red) or basic (turns blue).
They are often used interchangeably. Historically, 'acid test' referred to testing gold with nitric acid, making it slightly more emphatic (the ultimate, rigorous test). 'Litmus test' strongly retains the binary (yes/no) connotation.
Yes, though less common. It means to subject something to a decisive test (e.g., 'The theory was litmus-tested by new data').
A simple, decisive test that produces a clear yes/no or pass/fail result based on a single, crucial factor.
Litmus test: in British English it is pronounced /ˈlɪt.məs ˌtest/, and in American English it is pronounced /ˈlɪt.məs ˌtest/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “The acid test (near-synonymous idiom)”
Learning
Memory Aids
Mnemonic
Imagine a politician dipping a strip of litmus paper into a solution labelled 'policy'. If it turns blue (true to principles), they pass. If it turns red (compromised), they fail. This visualises the decisive, revealing nature of the test.
Conceptual Metaphor
COMPLEX JUDGMENT IS CHEMICAL ANALYSIS. A decisive factor is a reagent.
Practice
Quiz
In which context is the use of 'litmus test' LEAST appropriate?