a small, stiff strip of paper or cardboard, coated with powdered emery, used in manicuring.
Origin of emery board
First recorded in 1715–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for emery board
a strip of cardboard or wood with a rough surface of crushed emery, for filing one's nails
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