adj unchaste; lewd; unclean; obscene; as, impure language or ideas.
2. impure ·adj not purified according to the ceremonial law of moses; unclean.
3. impure ·adj not accurate; not idiomatic; as, impure latin; an impure style.
4. impure ·vt to defile; to pollute.
5. impure ·adj defiled by sin or guilt; unholy; unhallowed;
said of persons or things.
6. impure ·adj 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.