Webster's Revised Unabridged Dictionary · 1913

Wan

Wan , imperfect

Won. [obsolete] — Chaucer

Wan ({not transcribed}) , adjective

[Anglo-Saxon wann, wonn, wan, won, dark, lurid, livid, perhaps originally, worn out by toil, from winnan to labor, strive. See Win.]

Having a pale or sickly hue; languid of look; pale; pallid.
Sad to view, his visage pale and wan. — Spenser
My color... [is] wan and of a leaden hue. — Chaucer
Why so pale and wan, fond lover? — Suckling
With the wan moon overhead. — Longfellow

Wan , noun

The quality of being wan; wanness. [Rare]
Tinged with wan from lack of sleep. — Tennyson

Wan , intransitive verb

To grow wan; to become pale or sickly in looks.
All his visage wanned. — Shakespeare
And ever he mutter'd and madden'd, and ever wann'd with despair. — Tennyson