Im‐pure″ (?), a. [L. impurus; pref. im- not + purus pure: cf. F. impur. See Pure.]
1. 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.
2. Defiled by sin or guilt; unholy; unhallowed; — said of persons or things.
3. Unchaste; lewd; unclean; obscene; as, impure language or ideas. “Impure desires.” Cowper.
4. (Script.) Not purified according to the ceremonial law of Moses; unclean.
5. (Language) Not accurate; not idiomatic; as, impure Latin; an impure style.