validator
nounUK /ˈvælɪdeɪtə/
US /ˈvælɪdeɪtər/
A validator is a person or tool that checks if something is correct or true.
The teacher used a validator to check that every answer on the test was right.
RELATED WORDS
OTHER MEANINGS
2. A computer program that checks whether data or code follows the rules.
The website's validator flagged the form because the email address was missing.
3. A person who officially confirms that something meets a standard or is legally acceptable.
The validator signed the certificate to show the document was real.
4. In logic, something that proves an argument or statement is sound.
The professor acted as a validator for the student's reasoning.