many-one [men-ee-wuhn; usually read as men-ee-tuh-wuhn] Word Origin 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 British Dictionary definitions for many-one many-one adjective
- maths logic (of a function) associating a single element of a range with more than one member of the domain