One who has deep knowledge about the sufferings of all mundane Jīvas (living beings) which are caused by Karma and who is also able to prescribe the remedy the reof.
khedaṃ- saṃsārāntarvartināṃ prāṇināṃ karmavipākajaṃ duḥkhaṃ jānātīti khedajño duhkhāpanodanasamarthopadeśadānāt.
(Sūtra 1.6.3 Vṛ Pa 143)