[noo-diz-uh m, nyoo-]
the practice of going nude, especially in places that allow sexually mixed groups, in the belief that such practice benefits health.
Origin of nudism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the practice of nudity, esp for reasons of health, religion, etc
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
Online Etymology Dictionary, © 2010 Douglas Harper