Definition of impure

• a. - 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.
• a. - Defiled by sin or guilt; unholy; unhallowed; -- said of persons or things.
• a. - Unchaste; lewd; unclean; obscene; as, impure language or ideas.
• a. - Not purified according to the ceremonial law of Moses; unclean.
• a. - Not accurate; not idiomatic; as, impure Latin; an impure style.
• v. t. - To defile; to pollute.