Definitions 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

  Example: "A wan smile"

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

  Example: "The pale (or wan) stars"

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

  Example: "Her wan face suddenly flushed"

• name:  A female given name (rare: 1 in 100000 females; popularity rank in the U.S.: #3671)
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #9487)