Resting only on experience; applied without science.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective) (adj.) (adjective)
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adverb) (adv.) (adverb)
Resting on experience, or experiment and observation; versed in experiments; known only from experience; applied without science or rationale.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (adjective) (adj.) (adjective)

Usage examples:

History is in the empirical stage.
- The Coming of the Friars by Augustus Jessopp
At present, we have to look for the early traces of the first or empirical stage.
- Lectures on The Science of Language by Max Müller
The practical application of the theory of heat transfer, as developed at present, seems consequently to rest on these last two formulae, which from their nature are more or less empirical
- Steam, Its Generation and Use by Babcock & Wilcox Co.