Entry 1 sense Webster, 1913 Abaca /(ăb"ȧ*kȧ)/ · Ab·a·ca · IPA /ˈæb.əˌkɑ/ 01 n. The Manila-hemp plant (Musa textilis); also, its fiber. See Manila hemp under Manila. 1. The Manila-hemp plant (Musa textilis); also, its fiber. See Manila hemp under Manila. See: Manila