A family of Microsoft word processing software products for creating web, email, and print documents.
If you have not Saved the document you should be able to Close it without saving the changes in order to retain only what it contained prior to the last save.
Just speculating based on lack of detailed information: Your use of the term "edit protected" suggests that you may have done this in a Windows version of the program. If so, it's quite possible that you used protection settings which are not provided in Mac Word.