Anything such as the physique, sense-organs, external instrument, weapon etc., that (in some respect), becomes instrumental to Durgati (deteriorated re-incarnation) of the soul.
adhikaraṇaṃ - durgatinimittaṃ vastu tacca vivakṣayā śarīramindriyāṇi ca tatthā bāhyo halagantryādiparigrahaḥ.
(Bhaga 16.8 Vṛ)