Since when did “concerning” become an adjective meaning “causing concern?” I first noticed it in the New York Times sometime earlier this year. Now it’s being used both in the media and in everyday conversation as if it had been around forever. Yet the usage is not mentioned in either my 1971 abridged edition of the OED or my trusty 1980 New World Dictionary. Should we just accept this new word as an example of the English language moving on? Or is it concerning?