Entry 1 sense Webster, 1913 Unencumber /ŭnˌ-ĕn-kŭm'-bẽr/ · Un·en·cum·ber · IPA /ˌʌnɛnkˈʌmbər/ 01 v. t. To free from incumbrance; to disencumber. 1. To free from incumbrance; to disencumber.