It's an auto-antonym, a word that has two opposite meanings. Wikipedia used to have a good list of them, but it looks like they just deleted it. Thank god for

It's an auto-antonym, a word that has two opposite meanings. Wikipedia used to have a good list of them, but it looks like they just deleted it. Thank god for revision history: http://en.wikipedia.org/w/index.php?title=List_of_auto-antonyms_in_English&oldid=386146896 http://en.wikipedia.org/w/index.php?title=List_of_auto-anton...