ˌɛfləˈɹɛs ˌɛfləˈɹɛs ɪkˈspləʊd ɪkˈsploʊd come into or as if into flower These manifestations effloresced in the past be unleashed; emerge with violence or noise His anger exploded jump out from a hiding place and surprise (someone) The attackers leapt out from the bushes