Dictionary Definition:
Avasiṭṭha (sic & not osiṭṭha) [pp. of avasissati, Sk. avaśiṣṭa] left, remaining, over S ii.133; J i.138; v.339; VvA 66, pl. avasiṭṭhā all who are left, the others PvA 165 (janā).