ex·peri·men·tal·lyBrE [ɪkˌsperɪˈmentəli] ; NAmE [ɪkˌsperɪˈmentəli] adverb •This theory can be confirmed experimentally. •The new drug is being used experimentally on some patients. •He moved his shoulder experimentally to see if it still hurt. Main entry: ↑experimentalderived