Entry 1 sense Webster, 1913 Infeasible /ĭnˌ-fēz'-əb-əl/ · In·fea·si·ble · IPA /ˌɪnfˈiːzəbəl/ 01 a. Not capable of being done or accomplished; impracticable. 1. Not capable of being done or accomplished; impracticable.