say it: val-uh-DAY-shuhn
validation is a noun meaning "the act of validating; finding or testing the truth of something". It carries 2 recorded senses.
the act of validating; finding or testing the truth of something
the cognitive process of establishing a valid proof
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for validation come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.