Definition of substantiate
- substantiate a charge
substantiated his claim to local mountaineering fame with a photo of himself on the summit of Mount McKinley
Mr. MacGregor couldn't substantiate that it was Peter, and not some other rabbit, in the cabbage patch.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'substantiate.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: to prove the truth of (something)
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