a tangled or matted mass of stringlike steel shavings, used for scouring, polishing, smoothing, etc.
Origin of steel wool
First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for steel wool
a tangled or woven mass of fine steel fibres, used for cleaning or polishing
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