Empirical may refer to:
Epistemic topics
Empiricism, a theory of knowledge as coming only or primarily from experience Empirical evidence, a source of knowledge acquired by means of observation or experimentation Empirical research, a way of gaining knowledge by means of direct and indirect observation or experience Empirical relationship, a relationship based solely on observation rather than theory Quasi-empirical method, as close to empiricism as is possible when experience cannot falsify Empirical limits in science, problems with observation, and thus are limits of human ability to inquire and answer questions
Music
Empirical, the alternative title for the 1972 Jaki Byard album There'll Be Some Changes Made Empirical (jazz band), a British jazz group, formed in 2007, with four musicians
Other topics (many are applications of epistemic themes)
Empirical distribution function, the cumulative distribution function associated with the empirical measure of the sample Empirical formula, the simplest positive integer ratio of atoms present in a chemical compound Empirical likelihood, an estimation method in statistics Empirical measure, a random measure arising from a particular realization of a (usually finite) sequence of random variables Empirical modelling, computer modelling based on empirical observations rather than on mathematically describable relationships of the system modelled Empirical probability, the ratio of the number of outcomes in which a specified event occurs to the total number of trials Empirical process, a stochastic process that describes the proportion of objects in a system in a given state Empiric therapy, therapy based on clinical educated guesses Empirical, a research vessel that was used by Darth Vader in Star Wars