expungementWiktionary 原文英美构词拆解expungeexpunge词干ment-ment后缀-mentAttached to a verb to form a noun meaning the action denoted by the verb or its result.词源说明From expunge + -ment.释义名词noun1The act of expunging.2US, CanadaThe process by which the record of a criminal conviction is erased, destroyed or sealed.