IMPU'RE, adjective [Latin impurus; in and purus, pure.] 1. Not pure; foul; feculent; tinctured; mixed or impregnated with extraneous substance; as impure water or air; impure salt or magnesia. 2. Obscene; as impure language or ideas. 3. Unchaste; lewd; unclean; as impure actions. 4. Defiled by sin or guilt; unholy; as persons. 5. Unhallowed; unholy; as things. 6. Unclean; in a legal sense; not purified according to the ceremonial law of Moses. IMPU'RE, verb transitive To render foul; to defile. [Not used.]
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI