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au·then·ti·cate / ôˈ[unvoicedth]entiˌkāt/ • v. [tr.] prove or show (something, esp. a claim or an artistic work) to be true or genuine: they were invited to authenticate artifacts from the Italian Renaissance. ∎  validate: the nationalist statements authenticated their leadership among the local community. ∎  [intr.] Comput. (of a user or process) have one's identity verified. DERIVATIVES: au·then·ti·ca·tion / ôˌ[unvoicedth]entiˈkāshən/ n. au·then·ti·ca·tor / -ˌkātər/ n.

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