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To confirm formally as true, accurate, or genuine.
(verb-transitive)
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To guarantee as meeting a standard: butter that was certified Grade A. See Synonyms at approve.
(verb-transitive)
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To acknowledge in writing on the face of (a check) that the signature of the maker is genuine and that there are sufficient funds on deposit for its payment.
(verb-transitive)
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To issue a license or certificate to.
(verb-transitive)
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To declare to be in need of psychiatric treatment or confinement.
(verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.