1. Having a homogeneous or uniform composition; not mixed: pure oxygen.
2. Free from adulterants or impurities: pure chocolate.
3. Free of dirt, defilement, or pollution: "A memory without blot or contamination must be . . . an inexhaustible source of pure refreshment" (Charlotte Brontë).
4. Free of foreign elements.
5. Containing nothing inappropriate or extraneous: a pure literary style.
6. Complete; utter: pure folly.
7. Having no faults; sinless: "I felt pure and sweet as a new baby" (Sylvia Plath).
8. Chaste; virgin.
9. Of unmixed blood or ancestry.
10. Genetics. Produced by self-fertilization or continual inbreeding; homozygous: a pure line.
11. Music. Free from discordant qualities: pure tones.
12. Linguistics. Articulated with a single unchanging speech sound; monophthongal: a pure vowel.
13. Theoretical: pure science.
14. Philosophy. Free of empirical elements: pure reason.