Definition of MENTAL DEFICIENCY

Examples of mental deficiency in a Sentence

Recent Examples on the Web There doesn’t seem to be any negative neurological signs yet for physical or mental deficiencies. — Rania Aniftos, Billboard, "Third Day's Mac Powell Asks for Prayers After Wife Suffers Brain Aneurysm," 2 Dec. 2019 Look at the real-world results of Donald Trump's erratic behavior, whether through mental deficiency or moral deficiency or some combination thereof. — NBC News, "Meet the Press - August 25, 2019," 25 Aug. 2019 Then English gave his closing arguments, saying that McCoy was guilty, but only of second-degree murder, because of mental deficiencies. — Jon Schuppe, NBC News, "Supreme Court to hear case of lawyer who defied client in murder trial," 12 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mental deficiency.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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Last Updated

20 Dec 2019

Cite this Entry

“Mental deficiency.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/mental%20deficiency. Accessed 28 January 2020.