Entry 1 sense Webster, 1913 Erosive /ĭr-ōs'-ĭv/ · E·ro·sive · IPA /ɪrˈoʊsɪv/ 01 a. That erodes or gradually eats away; tending to erode; corrosive. 1. That erodes or gradually eats away; tending to erode; corrosive.