Source : Webster's Revised Unabridged Dictionary (1913)

Complexion \Com*plex"ion\ (k[o^]m*pl[e^]k"sh[u^]n), n. [F.
   complexion, fr. L. complexio. See {Complex}, a.]
   1. The state of being complex; complexity. [Obs.]

            Though the terms of propositions may be complex, yet
            . . . it is properly called a simple syllogism,
            since the complexion does not belong to the
            syllogistic form of it.               --I. Watts.

   2. A combination; a complex. [Archaic]

            This paragraph is . . . a complexion of sophisms.
                                                  --Coleridge.

   3. The bodily constitution; the temperament; habitude, or
      natural disposition; character; nature. [Obs.]

            If his complexion incline him to melancholy.
                                                  --Milton.

            It is the complexion of them all to leave the dam.
                                                  --Shak.

   4. The color or hue of the skin, esp. of the face.

            Tall was her stature, her complexion dark.
                                                  --Wordsworth.

            Between the pale complexion of true love, And the
            red glow of scorn and proud disdain.  --Shak.

   5. The general appearance or aspect; as, the complexion of
      the sky; the complexion of the news.

Source : WordNet®

complexion
     n 1: the coloring of a person's face [syn: {skin color}, {skin
          colour}]
     2: a combination that results from coupling or interlinking;
        "diphthongs are complexions of vowels"
     3: a point of view or general attitude or inclination; "he
        altered the complexion of his times"; "a liberal political
        complexion"
     4: texture and appearance of the skin of the face [syn: {skin
        condition}]
     5: (obsolete) a combination of elements (of dryness and warmth
        or of the four humors) that was once believed to determine
        a person's health and temperament
     v : give a certain color to; "The setting sun complexioned the
         hills"