1. soiled or likely to soil with dirt or grime

- wore an unclean shirt

Similar word(s): augean, bedraggled, draggled, befouled, fouled, begrimed, dingy, grimy, grubby, grungy, raunchy, black, smutty, buggy, cobwebby, feculent, filthy, foul, nasty, flyblown, sordid, squalid, greasy, oily, lousy, maculate, mucky, muddy, ratty, scummy, smudgy, snotty, sooty, uncleanly, unswept, unwashed, untidy, dirty, soiled

2. having a physical or moral blemish so as to make impure according to dietary or ceremonial laws

- unclean meat

- and the swine...is unclean to you

Similar word(s): nonkosher, terefah, tref, untouchable, impure, impure