It could be a termite, but it's more than like a "swarmer" or a reproductive ant looking to mate...
One shouldn't pose a significant problem, but if you see more (and they're indoors), our system creator can help you with a combination of product recommendations and non-chemical cleaning tips: http://www.raidkillsbugs.com/en-us/solut...
be afraid, be VERY afraid!
Found one winged ant should I be worried