Looking up...
having no doubt; sure
She is certain of her success.
She is confident and sure that she will succeed.
Often used to express strong confidence or assurance.
a specific but unspecified person or thing
A certain someone left a gift at my door.
An unspecified person left a gift at my door.
Used to refer to someone or something without naming them directly.
Use 'certain' to express strong confidence or to refer to an unspecified person or thing.
'Certain' can function as both an adjective and a determiner, but its meaning changes based on context.
From Old French 'certain', from Latin 'certus', meaning 'determined, resolved, sure'.
Can be used as an adjective to describe a state of confidence or as a determiner to refer to an unspecified person or thing.