- making a hypocritical show of religious devotion, piety, righteousness, etc.: They resented his sanctimonious comments on immorality in America.
- Obsolete. holy; sacred.
Origin of sanctimonious
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- affecting piety or making a display of holiness
C17: from Latin sanctimonia sanctity, from sanctus holy
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
Word Origin and History for unsanctimonious
Online Etymology Dictionary, © 2010 Douglas Harper