a combining form meaning “angled,” “angular,” used in the formation of compound words: polygon; pentagon.
Compare gonio-.

Origin of -gon

< Greek -gōnos, derivative of gōnía angle, akin to góny knee
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for -gon


n combining form

indicating a figure having a specified number of anglespentagon

Word Origin for -gon

from Greek -gōnon, from gōnia angle
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