[men-ee-wuhn; usually read as men-ee-tuh-wuhn]
adjective Logic, Mathematics.
(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.
Origin of many-one
First recorded in 1905–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
maths logic (of a function) associating a single element of a range with more than one member of the domain
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