Entry 1 sense Webster, 1913 Rubberize /rŭb'-ẽr-īzˌ/ · Rub·ber·ize · IPA /rˈʌbərˌaɪz/ 01 v. t. To coat or impregnate with rubber or a rubber solution or preparation, as silk. 1. To coat or impregnate with rubber or a rubber solution or preparation, as silk.