1》 not mixed or adulterated with any other substance or material.
↘(also ~-bred ) (of an animal or plant) of unmixed origin or descent.
2》 innocent or morally good.
3》 (of a sound) perfectly in tune and with a clear tone.
4》 (of a subject) theoretical rather than practical. Compare with applied .
5》 complete; nothing but.
6》 Phonetics (of a vowel) not joined with another to form a diphthong.
ME: from OFr. pur '~', from L. purus .