adjective Disposable; intended for a single use prior to being discarded.
Water was provided in throwaway plastic bottles, but the more ecologically minded of us refilled our initial bottles from the fountain.
adjective Extemporaneous; off the cuff.
The host made a throwaway remark about the president that was later repeated on the television news.
adjective Given in a casual manner, either deliberately or unconsciously, with apparent disregard for effect.
noun Something temporary and disposable, as: Any printed material that need not be kept after being read; especially, a flyer or brochure. A burner account.
noun Any printed material that need not be kept after being read; especially, a flyer or brochure.