either of a pair of often adjustable coverings for protecting the ears in cold weather.
Origin of earmuff
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
one of a pair of pads of fur or cloth, joined by a headband, for keeping the ears warm
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