noun
definitive edition; authoritative edition
Refers to a published work that is considered the most complete, reliable, or final version, often after revisions or compilation.
この辞書は日本語学習者のための決定版と言われている。
This dictionary is said to be the definitive edition for Japanese learners.
noun
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.
このカレーはスパイスの配合が絶妙で、まさに家庭料理の決定版だ。
This curry has an exquisite blend of spices and is truly the ultimate home cooking.
最終版 simply means the last version in a sequence, without necessarily implying it is the best or most authoritative.
Compound of 決定 (decision, determination) and 版 (edition, version). The term likely arose in publishing to denote a final, authoritative edition, and later extended to mean the best example of something.