certain
certain Lexical Profile
certain Game Scores & Validity
• adjective
Known for sure; established beyond doubt or question.
"One thing is certain: the project will require significant collaboration across all departments."
Having complete conviction about something; confident and free from doubt.
"Are you completely certain that you locked the laboratory door before leaving?"
Specific or particular, though not explicitly named, identified, or described.
"The archive grants access only to scholars who meet certain academic criteria."
Noticeable or appreciable in degree or amount, though moderate or subtle.
"There was a certain hesitation in his voice when he answered the committee's question."
• pronoun
Some particular people or things out of a larger group (usually followed by 'of').
"Certain of the committee members expressed reservations about the proposed timeline."
Word Nuance & Usage
The meaning of 'certain' shifts depending on its syntactic position: when used predicatively (e.g., 'She is certain of the answer'), it expresses complete confidence or inevitability; when used attributively before a noun (e.g., 'a certain person'), it denotes someone or something specific that is not explicitly named.
• Rhymes for certain
Word Origin & Etymology
Borrowed in Middle English from Old French 'certain', from Vulgar Latin '*certanus', an extended form of Classical Latin 'certus' ('determined, resolved, sure'), originally the past participle of 'cernere' ('to sift, discern, or decide').