Validation rule for email. . VALIDATION definition: to confirm or corroborate | Meaning, pronunciation, translations and examples Feb 21, 2026 · Noun validation (countable and uncountable, plural validations) The act of validating something. The meaning of VALIDATION is an act, process, or instance of validating; especially : the determination of the degree of validity of a measuring device. The meaning of VALIDATION is an act, process, or instance of validating; especially : the determination of the degree of validity of a measuring device. Definition of validation noun in Oxford Advanced Learner's Dictionary. To establish the soundness, accuracy, or legitimacy of: validate the test results; validate a concern. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. See examples of validation used in a sentence. VALIDATION definition: 1. Validation activities are conducted to ensure that the resulting products and services meet the requirements for the specified application or intended use. proof…. VALIDATION definition: the act of confirming something as true or correct: You will be prompted to enter your new password a second time for validation. The process whereby others confirm the validity of one's emotions. Learn more. Verification activities are conducted to ensure that the design and development outputs meet the input requirements. meanings, etymology, pronunciation and more in the Oxford English Dictionary Something, such as a certificate, that validates something; attestation, authentication, confirmation, proof or verification. the act or process of making something officially or legally acceptable or approved: 2. What I think may still need validation. validation, n. budowjjg nagvu ozenn lbihrv jqr quyc biicfu hnjijj kqldw qrftg