Actually, I think that that's the "emote meaning". I can't remember what the real meaning is though. I think it had something to do with windows (the way the word was formed, and I think it's supposed to be some sort of curtains and not eyebrows ) ... but I may be wrong...
Edit: Here it is: http://baike.baidu.com/view/181979.htm
光明,明亮,光