Open English Wordnet
Nouns
(n)complexiona combination that results from coupling or interlinking“diphthongs are complexions of vowels”
(n)complexiona point of view or general attitude or inclination“he altered the complexion of his times”, “a liberal political complexion”
(n)complexion(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