What does coat mean?
A coat is primarily an article of clothing: a sleeved garment worn over other clothes to keep warm or protect from weather, usually opening down the front with buttons, a zip, or a belt. The word also describes the natural fur, hair, or wool that covers an animal, as in 'the dog has a glossy coat'. A third sense refers to any thin layer applied over a surface — a coat of paint, varnish, or even dust. Used as a verb, to coat something is to spread such a layer across it. The word carries no strong connotation; it is neutral and versatile, appearing everywhere from fashion writing to DIY instructions and recipes. Derived forms include coated, uncoated, and coating. Historically rich compounds such as 'petticoat' and 'coat of arms' preserve older meanings of the term, when a coat could denote a close-fitting tunic rather than an outer layer. Its flexibility makes it one of the more quietly useful words in English.
A sleeved garment worn on the upper body, typically outdoors, fastening at the front; also the fur or hair covering of an animal, or a thin layer covering a surface.
"She pulled on her coat and stepped out into the snow."
In British English 'coat' often suggests a heavier garment than in American English, where it overlaps considerably with 'jacket'.
To cover something with a thin layer or coating of a substance.
"Dip the fish in batter until it is fully coated."
Most frequent in cooking, painting, and industrial contexts.
Standard plural; used both for multiple garments and for multiple layers of a covering.
"All the guests left their coats in the hallway."
The word 'coat' once meant little more than a tunic — but it survives today in everything from 'coat of arms' to 'petticoat', a linguistic fossil of medieval dress.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of coat
Coat entered Middle English from Old French 'cote', a robe or tunic, which itself derives from Latin 'cottus' or a related Germanic source referring to a coarse woven garment. Originally denoting a close-fitting undergarment or tunic, its sense broadened over time so that by later medieval and early modern English it referred to outer garments, giving rise to compounds like petticoat and surcoat. The figurative senses — an animal's covering and a surface layer — developed naturally from the idea of an outer covering. Romance cognates include Old French cote and Italian gota/cotta forms used in liturgical vestments.
Related word forms
How coat is actually used
As a noun, 'coat' is common in both formal and everyday speech; in British English it often implies a heavier outer garment than American usage, where 'coat' and 'jacket' overlap. As a verb it appears mainly in technical, craft, or cooking contexts.
Easily confused with coat
A cote is a shelter for animals such as doves or sheep, whereas a coat is a garment or outer covering.
The coast is land beside the sea, unrelated to coat except in similar spelling of related historical forms.