Meaning

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

verb become pale and sickly

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

originFrom Middle English wan, wanne (“grey, leaden; pale grey, ashen; blue-black (like a bruise); dim, faint; dark, gloomy”), from Old English wann (“dark, dusky”), from Proto-Germanic *wannaz (“dark, swart”), of uncertain origin. Cognate with Old Frisian wann, wonn (“dark”).

Etymology from Wiktionary, CC BY-SA 3.0