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middle name

noun
  1. the part of a person's name occurring between the first and family names, as a second given name or a maternal surname.
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Origin of middle name

An Americanism dating back to 1825–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for middle name

middle name

noun
  1. a name between a person's first name and surname
  2. a characteristic quality for which a person is knowncaution is my middle name
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012