ir·re·claim·a·ble ( r -kl m -b l). adj. Impossible to reclaim; being such that reclamation is precluded: irreclaimable wasteland. ir re·claim a·bil i·ty, ir re·claim a·ble·ness n. ir re·claim a·bly adv. irreclaimable [ˌɪrɪˈkleɪməbəl]. adj. not able to be ...