Based on experience as opposed to theoretical knowledge.(adverb)
Based on data gathered in the real world.(adverb)
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Use "empirically" in a sentence
"A key prediction of Williamson's theory, which has also been supported empirically, is therefore that the propensity of economic agents to conduct their transactions inside the boundaries of a firm increases along with the relationship-specific features of their assets."
"When we have the technology to measure pain empirically (FMRI maybe?), we can revisit our definitions."
"All IDers agree that the question of whether we can infer design empirically is interesting."