humifyPronunciation: /ˈhjuːmɪfʌɪ/Definition of humify verb (humifies, humifying, humified) [with object] convert (plant remains) into humus: plant material added to the soil has first to be humifiedDerivatives humificationPronunciation: /-fɪˈkeɪʃ(ə)n/ noun humify in other Oxford dictionaries Definition of humify in the US English dictionary