A manuscript is a written or typewritten document that hasn't been published yet. It's typically an author's original work that is submitted for review or editing before being printed or published as a book or article. Full definition
The term «peer review» is generally interpreted as the review of manuscripts for journals. (newscientist.com)
They get a lot of manuscripts for consideration already. (toughnickel.com)
Some authors come in with manuscripts in very strong shape and might need just light edits whereas others may need more editorial feedback. (annakatmore.com)