a suffix used to form nouns either from adjectives in -ant or from verbs: brilliance; appearance.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for -ance
suffix forming nouns
indicating an action, state or condition, or qualityhindrance; tenancy; resemblance Compare -ence
Word Origin for -ance
via Old French from Latin -antia; see -ancy
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