not pure; not clean; dirty; foul; filthy; containing something which is unclean or unwholesome; mixed or impregnated extraneous substances; adulterated; as, impure water or air; impure drugs, food, etc.-defiled by sin or guilt; unholy; unhallowed; -- said of persons or things.-unchaste; lewd; unclean; obscene; as, impure language or ideas.-not purified according to the ceremonial law of moses; unclean.-not accurate; not idiomatic; as, impure latin; an impure style.-to defile; to pollute.