What does empirical mean?
"Empirical" describes knowledge, methods, or conclusions that are grounded in observation, experiment, and direct experience rather than in theory, intuition, or pure reasoning. When scientists say a claim is empirically supported, they mean real-world data — measurements, trials, recorded observations — back it up. The word is central to academic and scientific writing, appearing most often in phrases such as "empirical evidence," "empirical research," and "empirical data." It connotes rigor and objectivity: to call something empirical is to say it has been tested against reality and can, in principle, be verified by others. The term traces back through Latin to the Greek empeiria, meaning experience, so its very history reflects its meaning — knowledge earned through encounter with the world rather than deduced from first principles. Its close relatives include "experience" and "experiment," and its philosophical counterpart, "empiricism," names the doctrine that experience is the ultimate source of knowledge.
Based on, concerned with, or verifiable by observation and experience rather than theory or pure logic.
"The economist tested her hypothesis using empirical data drawn from thirty years of market records."
Most frequent in academic and scientific contexts; the standard modern form, preferred over the older variant "empiric."
(Of medicine or treatment, now historical or specialized) relying on practical experience and trial rather than scientific understanding of how it works.
"Early herbalists used many empirical remedies long before chemistry could explain why they worked."
This older sense survives mainly in histories of medicine and in the fixed phrase "empirical treatment" in clinical writing.
"Empirical" comes from the Greek word for "experience" — making it, quite literally, the language of learning things the hard way: by testing them in the real world.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of empirical
"Empirical" derives from the Greek empeirikos, meaning experienced, from empeiria (experience), formed from en (in) plus peira (a trial or attempt). It entered English in the early 17th century, initially via Latin empiricus and often with a slightly pejorative medical sense describing quacks who relied on trial and error rather than training. Over time the word shed that stigma and became the standard term for observation-based knowledge, giving rise to "empiricism" as a major school of philosophy associated with thinkers such as Locke and Hume.
Related word forms
How empirical is actually used
"Empirical" belongs chiefly to formal, academic registers — especially the sciences, philosophy, and social research — and is rarely used in casual conversation. It carries a positive connotation of rigor and objectivity, since calling a claim "empirical" implies it can be tested and verified rather than merely asserted. The adverb "empirically" and the noun "empiricism" are common derivatives.
Easily confused with empirical
"Imperial" relates to an empire or emperor, while "empirical" relates to knowledge gained through observation and experience.
"Empiric" is an older, less common variant of the adjective (and a noun for someone relying on practical experience), while "empirical" is the standard modern form.