Yes. In fact, some were used to convey secret messages by means of both sender and recipient having the same edition and having a messenger transport a series of numbers to the co-conspirator. For example. 177, 12 meant page 177. Word 12
Damn good question, I'm actually starting to doubt it. Daniel Webster, whom I believe the Websters Dictionary is named after, was a little AFTER the Revolutionary War. At least I think he was. I would be curious how others would answer this question or what links will be posted on this. I was under the impression that Daniel Webster made the first dictionary.
Maybe? First American dictionary was published by Daniel Webster in 1806 AFTER the war was over but the first English language dictionary was published in Britain in 1604 and they certainly had access to books from England so they may have had British and even older Latin dictionaries.