aperiodicPronunciation: /ˌeɪpɪərɪˈɒdɪk/Definition of aperiodic adjective technical not periodic; irregular: aperiodic fluctuations Physics denoting a potentially oscillating or vibrating system (such as an instrument with a pointer) that is damped to prevent oscillation or vibration. Derivatives aperiodicityPronunciation: /-rɪəˈdɪsɪti/ noun aperiodic in other Oxford dictionaries Definition of aperiodic in the US English dictionary