a leather, metal, fabric, or plastic bracelet or strap attached to a wrist watch to hold it on the wrist.
Origin of watchband
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
US, Canadian and Australian a strap of leather, cloth, etc, attached to a watch for fastening it around the wristAlso called (in Britain and other countries): watchstrap
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