LABEFACTION Meaning of LABEFACTION in English [ ˌlabɪ'fakʃ(ə)n ]■ noun archaic deterioration or downfall.OriginC17: from L. labefactio(n-) , from labefacere 'weaken', from labi 'to fall' + facere 'make'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004