asepticPronunciation: /eɪˈsɛptɪk/Translate aseptic | into Italian | into Spanish Definition of aseptic adjective free from contamination caused by harmful bacteria, viruses, or other microorganisms; surgically sterile or sterilized. (of surgical practice) aiming at the complete exclusion of harmful micro-organisms. Derivatives aseptically adverb aseptic in other Oxford dictionaries Definition of aseptic in the US English dictionary