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many-one

[men-ee-wuhn; usually read as men-ee-tuh-wuhn]
adjective Logic, Mathematics.
  1. (of a relation) having the property that each element is assigned to one element only but that many elements may be assigned to the same element.
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Origin of many-one

First recorded in 1905–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for many-one

many-one

adjective
  1. maths logic (of a function) associating a single element of a range with more than one member of the domain
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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