1 unmixed, unadulterated, unalloyed, simon-pure; 24-carat or US also 24-karat, sterling, solid; real, genuine, authentic, flawless, faultless, perfect, natural, true, simple:
We have made every effort to keep the blood-line of these horses completely pure. Pure gold is not used for coins or jewellery because it is too soft. She wore a dress of the purest white.
2 uncontaminated, clear, clean, wholesome, sanitary, uninfected, disinfected, pasteurized, sterilized, sterile, antiseptic, unpolluted, spotless, immaculate, unsullied, unbesmirched, unblemished, unmarred, unstained, untainted:
It was refreshing to breathe pure air again. Stringent tests ensure that the substances are pure before they go on the market
3 chaste, virginal, virgin, intact, maidenly, vestal, undefiled, innocent, guileless, virtuous, modest, moral, correct, proper, decent, decorous, uncorrupted, blameless, sinless, impeccable:
As far as we can tell, she led a totally pure life.
4 theoretical, hypothetical, conjectural, speculative, abstract, conceptual, notional, philosophical, academic(al):
His field is pure science, and he cares little how the results of his work might be applied to everyday life
5 unalloyed, simple, unmitigated, sheer, utter, absolute, unqualified, complete, total, perfect, thorough, outright, downright, out-and-out, mere:
Many regarded the notion that man could ever fly as pure nonsense. Any resemblance to a living person is pure coincidence.
6 honourable, (highly) principled, righteous, upright, honest, straightforward, high-minded, pious, worthy, good, ethical, virtuous, sincere, above suspicion, above reproach, like Caesar's wife:
Can anyone doubt that their motives in striving for international peace are pure?