A definitive book or performance is thought to be the best of its kind that has ever been done or that will ever be done. His `An Orkney Tapestry' is still the definitive book on the islands
Stamps that are issued for ordinary postal needs and placed on sale for an unlimited period as opposed to commemorative By contrast with commerative, definitive stamps tend to be more generic in concept, and/or to have subjects that are relatively "timeless" Most importantly, definitive stamps tend to remain on sale for a longer period, and are not commemorating any particular thing
supplying or being a final or conclusive settlement; "a definitive verdict"; "a determinate answer to the problem" clearly defined or formulated; "the plain and unequivocal language of the laws"- R
Something that is definitive provides a firm conclusion that cannot be questioned. No one has come up with a definitive answer as to why this should be so + definitively de·fini·tive·ly The Constitution did not definitively rule out divorce
Stamp issued in a large indefinite quantity and for an indefinite period, usually several years or more Definitive stamp designs usually do not honour a specific time-dated event