certain, for certain, indubitably / certain (of indefinite, unknown or simply unmentioned identity, quality or quantity) (prepositive to the noun it modifies, and usually preceded by an indefinite article) / certain (sure, positive) (postpositive to the modified noun) / certain (fixed, determined) / certain (specified, particular)

certain; certainty

certain: a determined but unspecified amount of ; some

absolutely sure, absolutely certain

middle-aged

feminine plural of certain

feminine singular of certain

plural of certain

plural of certain: some, some people

certainly (with certainty, without doubt)