Definitive
Definitive adjective - Being the most accurate and apparently thorough.
Key and definitive are semantically related. In some cases you can use "Key" instead an adjective "Definitive".
Key
Key adjective - Coming before all others in importance.
Definitive and key are semantically related. Sometimes you can use "Definitive" instead an adjective "Key".
Mutual synonyms
Both words in one sentence
- But if the deceased host is key for the mission, or no more hosts remain, then it's a definitive Game Over.
Source: Death Is a Slap on the Wrist -
Truck Driver's Gear Change: The definitive recurring element in entries, the last chorus of a song often cranks up a key or two. Why?
Source: Series / Eurovision Song Contest
Cite this Source
Key and Definitive. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/definitive/key
Definitive & Key. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/definitive/key>.
Key or Definitive. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/definitive/key.
Google Ngram Viewer shows how "definitive" and "key" have occurred on timeline