خس ḵẖas P s. f. 1. The name of a grass of the roots of which ṭaṭṭīs are made. (Andropogon muricatum). 2. Any useless herb or stick. خس پوش ḵẖas-posh, adj. Covered with thorns. خس وخار ḵẖas o ḵẖār, or خس و خاشاک ḵẖas-o-ḵẖāshāk, s. m. Litter of things, rubbish.