Empirical
adjective /ɪmˈpɪrɪkəl/ — Based on what can be observed and tested, not theory.
Definition
Based on observation or experience rather than theory or pure logic; derived from experiment and evidence.
Beyond the definition
The empirical standard is what separates science from speculation. It's a word worth using when you want to distinguish claims that can be tested from claims that are simply believed.
Origin & history
From Greek empeirikos — experienced (empeiria 'experience' + -ikos). The empiricist learns through doing and observing, not through pure reasoning.
Example sentences
Illustrative sentences for learning, not verified community posts or sourced quotations.
The empirical evidence suggested the opposite of what the theory predicted.
Good decisions should be empirical, not emotional — though they rarely are.
She demanded empirical support before changing any clinical protocol.
Synonyms
evidence-based, observational, experimental, measurable
Antonyms
theoretical, speculative, anecdotal
Related words
- epistemology
- hypothesis
- methodology
- quantitative
Empirical vs theoretical
Theoretical describes knowledge derived from reasoning, principles, and models — not necessarily tested against reality. Empirical describes knowledge derived from observation and experiment. The two are complementary: theory generates predictions; empirical testing validates or refutes them. Theoretical work can be brilliant without being empirically confirmed; empirical findings can be valid even without a theoretical framework. Science needs both; empirical data is the final arbiter.
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Word in the Wild
See how this word appears in life, language and stories.
Illustrative sentences and imagined stories for learning — not verified sightings, interviews, or sourced quotations.
Fictional scene
Scientist looking through a microscope
A scientist looks through a microscope at a bench with petri dishes and glass pipettes, while circular diagrams show cells.
The observation of cells and microbes derived from laboratory equipment represents the reliance on experiment and observable evidence to ground understanding, as opposed to relying purely on theory.
Image credit: Wordspun · AI-generated conceptual illustration