I found the article of New Yorker magazine dealing with U.S. Supreme Court Justice, Antonin Scalia’s scrupulousness of the usage of words under the title’ “Salia’s word game” very interesting as an English language enthusiast. After introducing Scalia has quoted Samuel Johnson’s Dictionary of the English Language, Noah Webster’s American Dictionary of the English Language, Timothy Cunningham’s A New and Complete Law Dictionary, Random House College Dictionary, and others of more recent vintage in Supreme Court opinions, the author says;
“More than any other sitting Justice, he sees himself as both an authority on and an arbiter of our mother tongue. This makes him, in some instances, the last word on words". http://www.newyorker.com/online/blogs/newsdesk/2014/06/scalia-word-games.html?printable=true¤tPage=all#ixzz34w5n6onk
What does “make the last word on word” mean?