Entry 1 sense Webster, 1913 Exhaustible · Ex·haust·i·ble · IPA /ɪɡˈzɔːstɪbl̩/ 01 a. Capable of being exhausted, drained off, or expended. Opposite of inexhaustible. 1. Capable of being exhausted, drained off, or expended. Opposite of inexhaustible.