lignify Syllabification: (lig·ni·fy)Pronunciation: /ˈlignəˌfī/Definition of lignify verb (lignifies, lignifying, lignified) [with object] (usually as adjective lignified) Botany make rigid and woody by the deposition of lignin in cell walls. Derivatives lignificationPronunciation: /ˌlignəfəˈkāSHən/ noun lignify in other Oxford dictionaries Definition of lignify in the British & World English dictionary