Consisting of loose leaves (pages), often collected in a binder, rather than being bound like a book or stapled.(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "looseleaf" in a sentence
"An old letter from a girlfriend written on looseleaf paper in blue ink and with several places where the blue ink has run, detailing her undying love."
"In a looseleaf binder she keeps a running list of book requests from teachers."
"For some of my books, I set up a looseleaf notebook to hold all the material I've come up with."