Validate/ˈvælɪdeɪt/ Definition 1 of 3Pro Tip 1/3Official Procedures Used when referring to actions that ensure documents or credentials are correctly authorized. You need to validate your visa before travel. Pro Tip 2/3Recognition Implies gaining formal acknowledgment of something as legitimate. After years of studying, her thesis was finally validated. Pro Tip 3/3Legal Acceptance Often used in contexts where legal status or compliance is crucial. The agency will validate the contract tomorrow.