verify
1. [ verb ] confirm the truth of
Examples:

"Please verify that the doors are closed" "verify a claim"

Related terms: confirm see check check confirmation
2. [ verb ] verify or regulate by conducting a parallel experiment or comparing with another standard, of scientific experiments
Synonyms: control
Examples:

: "Are you controlling for the temperature?"

Related terms: test see
3. [ verb ] attach or append a legal verification to (a pleading or petition)
Related terms: confirm law
4. [ verb ] to declare or affirm solemnly and formally as true
Synonyms: swear assert affirm swan aver avow
Examples:

"Before God I swear I am innocent"

Related terms: declare declare hold declare assure claim attest protest avowal affirmation swearer affirmer