我发回帖之前查了OALD, Cambridge, MacMillan, Longman, 都没有连词的用法（当然，副词都是有的），所以才敢发。

如果也查了牛津的全版字典，就不会发了。

http://www.macmillandictionary.com/search/american/?q=notwithstanding

http://www.oxfordlearnersdictionaries.com/definition/english/notwithstanding_1?q=notwithstanding

http://dictionary.cambridge.org/dictionary/english/notwithstanding

http://www.ldoceonline.com/dictionary/notwithstanding