Certain
Certain adjective - Having been established and usually not subject to change.
Usage example: a certain percentage of the profits will go to charity
Definite is a synonym for certain in fixed topic. In some cases you can use "Definite" instead an adjective "Certain", when it comes to topics like particular, determined, resolved, unquestionable. popular alternative
Definite
Definite adjective - So clearly expressed as to leave no doubt about the meaning.
Usage example: a definite instruction not to let anyone in the house while the parents were out for the evening
Certain is a synonym for definite in particular topic. You can use "Certain" instead an adjective "Definite", if it concerns topics such as resolved, unmistakable, incontestable. popular alternative
Mutual synonyms
Related pairs
Both words in one sentence
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It's a bit hidden in the song, but certain lyrics like "And the marching on the left/ Is now the marching on the right/ And the beards have all grown longer overnight" make it a definite reference.
Source: Rip Van Winkle -
Big Bad Wannabe: Nothing definite, but certain chapters seem to have Higa headed in this direction.
Source: Manga / Sekirei -
There's a definite afterlife in Charmed, though it seems that certain spirits can return to Earth whenever they please.
Source: Heaven
Cite this Source
Definite and Certain. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/certain/definite
Certain & Definite. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/certain/definite>.
Definite or Certain. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/certain/definite.
Google Ngram Viewer shows how "certain" and "definite" have occurred on timeline