definitive edition; authoritative edition
Refers to a published work that is considered the most complete, reliable, or final version, often after revisions or compilation.
This dictionary is said to be the definitive edition for Japanese learners.
the best of its kind; the ultimate; the definitive
Used in the pattern 〜の決定版 to describe something that represents the pinnacle or most representative example of its category, not limited to published works.
This curry has an exquisite blend of spices and is truly the ultimate home cooking.