It depends upon the dictionary you look at. The older they are it is likely a lot different than what you'll get most places. I actually did look at a lot of dictionaries before using the terms.
Though in modern times the definitions of a lot of words are being changed. Often changed from what they have been for 1000s of years.
Yet let's take it a step further. A dictionary is made by humans. That is why each dictionary differs. They are meant as a tool to help people learn words they don't know. They however, are not the AUTHORITY on what a word must be. Otherwise, they'd have the same definitions. They don't. So falling upon dictionary definitions is nothing more than an Argument from Authority fallacy. ;)
I buy into definitions a lot more if they are accompanied by the etymology of the word.