Webster’s Dictionary was first published in 1825, so would not have been of use to the Founders. Samuel Johnson published the first English language dictionary in 1750, but it was British. Yes, Cawdrey had his earlier Table Alphabeticall, but it was a listing of words without definitions.
Don’t care. You point wasn’t even an issue. What does Webster say the word ‘natural’ means? It hasn’t changed. Are you a computer programmer by chance? I mean, it takes that level of nerdom to have no reading comprehension and no social skills as to offer facts not even important to the discussion.