Definition of "Wan" :

noun: a computer network that spans a wider area than does a local area network

verb: become pale and sickly

adjective: lacking vitality as from weariness or illness or unhappiness

"A wan smile."

adjective: abnormally deficient in color as suggesting physical or emotional distress

"Her wan face suddenly flushed."

adjective: (of light) lacking in intensity or brightness; dim or feeble

"The pale (or wan) stars."