Pronunciation: (sang'gwin),[key] —adj. 1. cheerfully optimistic, hopeful, or confident: a sanguine disposition; sanguine expectations. 2. reddish; ruddy: a sanguine complexion. 3. (in old physiology) having blood as the predominating humor and consequently being ruddy-faced, cheerful, etc.
4. bloody; sanguinary.
5. blood-red; red.
6. Heraldry.a reddish-purple tincture.
—n. a red iron-oxide crayon used in making drawings.