1 natural colour and appearance of the skin of the face （天生的）面色, 脸色, 面貌
*a good, dark, fair, sallow, etc complexion 脸色好、黑、白、黄等.
2 (usu sing 通常作单数) general character or aspect of sth 某事物总的特性或方面
*Her resignation puts a different complexion on things, ie changes one's view of the affair. 她一辞职则情随事迁（使人改变了对事务的看法）.
* a victory that changed the complexion of the war, ie made the probable result different, gave hope of an early end, etc 扭转战局的胜利.
[Date: 1300-1400; Language: Old French;Origin:Medieval Latin complexio, from Latin, 'combination', from complexus; COMPLEX1]
the natural colour or appearance of the skin on your face
Drinking lots of water is good for the complexion.
pale/fair/ruddy etc complexion
(=a pale, fair, red etc face)
She was fair-complexioned with pale blonde hair.
the general character or nature of something
Crime has risen everywhere, under governments of every political complexion.
put a different/new/fresh complexion on sth
to make a situation or event seem different
This document puts a different complexion on the matter.