The definition of confirm is to approve or to establish the truth or make stronger.
To prove that something, such as a document, is what it purports to be, especially so that the item can be admitted into evidence at a trial or hearing. For example, a party wishing to admit a letter into evidence may ask the witness whether it is, indeed, the letter he received, does he recognize the handwriting, and similar questions.
To declare positively; assert to be true:
To formally assert as a fact, such as in a pleading; to allege.
The amount of a particular substance in a given amount of another substance, especially a solution or mixture.
To make more certain the validity of; confirm; bolster; support
To show the need for; call for; make necessary
To call on (God, a god, a saint, the Muses, etc.) for blessing, help, inspiration, support, etc.
Show is defined as to bring into view, teach, or display.
To contract to receive and pay for a certain number of issues of a publication, for tickets to a series of events or performances, or for a utility service, for example.
To assume and carry successfully, as the part of an actor; to represent or act; to sustain.
(Law) To administer a legal oath to:
To be evidence of; indicate
To demonstrate the truth or accuracy of, as by the presentation of evidence:
To back; to support; to confirm.
To refuse to grant or give
To cause to move backward or in a reverse direction:
To make evident; indicate; show
(Law) To show an adequate reason for something done
To guarantee (a product).
To confirm formally as true, accurate, or genuine:
To give evidence of; indicate:
To be or give a sign of; indicate:
To be or give a sign of:
Mark is defined as to put an indication or symbol on something in order to identify it.
To give grounds for believing in the existence or presence of
(Archaic) To declare under oath, esp. in writing; testify
(Law) To state or testify under oath but out of court
(Biol.) With the same inherited trait or traits as a parent; without variation
(Informal, Dial.) To take legal action (against)
Manifest is defined as to prove or make something clear.
To show clearly and deliberately; manifest:
Find another word for attest. In this page you can discover 52 synonyms, antonyms, idiomatic expressions, and related words for attest, like: avow, confirm, ratify, authenticate, affirm, aver, concentration, consideration, corroborate, courtesy and diligence.