to make sure that something is true or correct, or to make a fact or statement certain, to establish the truth or correctness of something that was previously uncertain or in question

confirm somebody in something, confirm something in writing, confirm somebody's worst fears

confirmed bachelor, confirmed alcoholic, confirmed skeptic

Formal and Informal Expressions of confirm

In different contexts, you can replace 'confirm' with suitable alternatives. In a more formal setting, 'verify, corroborate' is apt. In informal speech or writing, 'double-check, make sure' is a commonplace synonym.

confirm: Explore its Definition & Usage

confirm Definition

1to make sure that something is true or correct, or to make a fact or statement certain
2to establish the truth or correctness of something that was previously uncertain or in question

Using confirm: Examples

Take a moment to familiarize yourself with how "confirm" can be used in various situations through the following examples!

Example
Can you confirm your reservation number?
Example
The DNA test confirmed that he was the father.
Example
I need to confirm with my boss before I can give you an answer.

confirm Synonyms and Antonyms

Synonyms for confirm

Antonyms for confirm

Idioms Using confirm

confirm somebody in something
to strengthen someone's belief or conviction in something
Example
His success confirmed him in his belief that hard work pays off.
confirm something in writing
to provide written proof or confirmation of something
Example
Please confirm your acceptance of the job offer in writing.
confirm somebody's worst fears
to prove that something bad that someone feared is actually true
Example
The test results confirmed her worst fears about her health.

Phrases with confirm

confirmed bachelor
a man who is not married and is unlikely to ever marry
Example
He's a confirmed bachelor and has no interest in settling down.
confirmed alcoholic
a person who is addicted to alcohol and has been for a long time
Example
After years of heavy drinking, he became a confirmed alcoholic.
confirmed skeptic
a person who habitually doubts or questions accepted opinions or beliefs
Example
She's a confirmed skeptic and always asks for evidence before believing anything.

Origins of confirm

from Latin 'confirmare', meaning 'strengthen, establish'

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Summary: confirm in Brief

To 'confirm' [kənˈfɜːm] means to establish the truth or correctness of something that was previously uncertain or in question. It is often used to make sure that something is true or correct, exemplified by 'Can you confirm your reservation number?' 'Confirm' extends into phrases like 'confirmed bachelor,' and idioms like 'confirm somebody in something,' denoting strengthening of beliefs, and 'confirm somebody's worst fears,' implying proving bad news.