definitive

/dɪˈfɪnɪtɪv/
noun
  1. A definitive thing, such as a final or authoritative version or statement.
    • He aimed to write the definitive on the history of jazz.
    • The new edition is the definitive of the dictionary.
    • Critics hailed the film as the definitive of the superhero genre.
adjective
  1. Serving as the final, most complete, or most authoritative version of something.
    • After years of research, she wrote the definitive biography of the scientist.
    • The museum published a definitive catalog of its ancient artifacts.
    • This book is considered the definitive guide to bird watching.
  2. Clearly decided, settled, or not open to change.
    • The judge gave a definitive ruling on the case.
    • We need a definitive answer by Friday.
    • There is no definitive proof that the two events are connected.
  3. Of a quality or type that is the best or most typical example.
    • Many fans call this album the definitive rock record of the 1990s.
    • Her style is the definitive look for modern minimalism.
    • That performance was the definitive interpretation of the role.