abnormalityEnglishOxford Dictionary of Englishabnormality /ˌabnəˈmalɪti , ˌabnɔːˈmalɪti / ▸ noun (plural abnormalities) an abnormal feature, characteristic, or occurrence: babies with congenital abnormalities. ▪ [mass noun] the quality or state of being abnormal: miscarriage can be caused by fetal abnormality.