silicify Syllabification: (si·lic·i·fy)Pronunciation: /səˈlisəˌfī/Definition of silicify verb (silicifies, silicifying, silicified) [with object] (usually be silicified) convert into or impregnate with silica. Derivatives silicificationPronunciation: /səˌlisəfiˈkāSHən/ noun silicify in other Oxford dictionaries Definition of silicify in the British & World English dictionary