What does emery mean?
Emery is a dense, dark, naturally occurring rock composed primarily of corundum — one of the hardest known minerals — combined with iron-rich minerals such as magnetite or hematite. Because of its exceptional hardness, it has long been prized as an abrasive: crushed into powder or bonded into wheels, it is used to grind, polish, and smooth materials ranging from metal and glass to stone. Most people encounter it indirectly through everyday products like the emery board, a small file coated with abrasive grit that is a staple of nail care, or through emery paper and cloth used in workshops and crafts. The word functions mainly as an uncountable noun naming the substance itself, though it also appears attributively to describe tools coated with it. Historically significant in metalworking and manufacturing before synthetic abrasives became widespread, emery remains a familiar term wherever fine finishing work matters, lending its name to some of the most common polishing implements in daily use.
A hard, granular rock consisting of corundum with iron-bearing minerals, used as an abrasive for grinding and polishing.
"The workshop stocked coarse-grade emery for cleaning castings."
Usually treated as an uncountable (mass) noun; plural forms are rare.
Used attributively to designate tools or materials coated with this abrasive, as in 'emery board', 'emery paper', or 'emery cloth'.
"He buffed the scratch out with a sheet of fine emery paper."
Rarely used; 'emery' is normally an uncountable mass noun. A plural may occasionally appear when referring to varieties or grades of the material.
"Different emeries are graded according to grain size."
That humble emery board in your makeup bag is powered by a rock so hard it can polish steel — emery is mostly corundum, the same mineral family as rubies and sapphires.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of emery
The word 'emery' entered English in the late Middle Ages via Middle French 'émeri' and Old French 'émery', ultimately deriving from Italian 'smeriglio', which traces back through medieval Latin to Greek 'smyris', meaning the abrasive powder itself. This reflects the historical trade routes by which the valuable grinding material reached Western Europe, with high-quality emery traditionally sourced from the Greek island of Naxos. The Greek root connects the term to ancient practices of smoothing and polishing, making 'emery' a rare surviving link between modern hardware vocabulary and classical antiquity.
Related word forms
How emery is actually used
'Emery' is typically uncountable when referring to the mineral itself, but it appears frequently as an attributive modifier in everyday terms like 'emery board' and 'emery paper', which are common in both household and professional contexts.
Easily confused with emery
'Emory' is a proper noun (notably Emory University), whereas 'emery' is a common noun denoting an abrasive mineral.