unary

[ yoo-nuh-ree ]
/ ˈyu nə ri /

adjective Mathematics.

pertaining to a function whose domain is a given set and whose range is contained in that set.

Origin of unary

1570–80; < Latin ūn(us) one + -ary, on the model of binary
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British Dictionary definitions for unary

unary

/ (ˈjuːnərɪ) /

adjective

consisting of, or affecting, a single element or component; monadic

Word Origin for unary

C16 (in the obsolete sense: a unit): from Latin unus one + -ary
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