pure - English dictionary definition

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1. Pure  Separate from all heterogeneous or extraneous matter; free from mixture or combination; clean; mere; simple; unmixed; as, pure water; pure clay; pure air; pure compassion.
2. Pure  Free from moral defilement or quilt; hence, innocent; guileless; chaste; -- applied to persons.
3. Pure  Free from that which harms, vitiates, weakens, or pollutes; genuine; real; perfect; -- applied to things and actions.
4. Pure  Ritually clean; fitted for holy services.
5. Pure  Of a single, simple sound or tone; -- said of some vowels and the unaspirated consonants.
6. pure  not mixed; "pure oxygen"
7. pure absence  petit mal seizure without other complications; followed by 3-per-sec brain-wave spikes
8. pure and simple  of the clearest kind; usually used for emphasis; "it''s the literal truth"; "a matter of investment, pure and simple"
9. pure binary numeration system  a positional system of numeration that uses binary digits and a radix of 2
10. pure imaginary number  an imaginary number of the form a+bi where a is 0