(1):
(n.) The general appearance or aspect; as, the complexion of the sky; the complexion of the news.
(2):
(n.) The bodily constitution; the temperament; habitude, or natural disposition; character; nature.
(3):
(n.) A combination; a complex.
(4):
(n.) The state of being complex; complexity.
(5):
(n.) The color or hue of the skin, esp. of the face.