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."