What does coin mean?
A coin is a small, durable piece of metal — usually round and flat — stamped with an official design and issued by a governing authority as legal tender. Coins have served as one of humanity's most enduring forms of money, valued both for their face value in exchange and sometimes for the intrinsic worth of their metal. Beyond its monetary sense, 'coin' functions as a verb meaning to manufacture coins at a mint, and more figuratively, to invent a new word or expression, as in 'she coined the term.' This verbal sense gives rise to the familiar idiom 'to coin a phrase.' The word also appears in the expression 'two sides of the same coin,' describing two inseparable or contrasting aspects of a single thing. Whether discussing numismatics, economics, or the birth of new vocabulary, 'coin' remains a precise and versatile word bridging material wealth and linguistic creativity.
A small, flat, typically round piece of metal (or occasionally another material) stamped by a government or issuing authority and used as money.
"The archaeologists unearthed Roman coins dating from the second century."
Often used collectively without an article when referring to money generally: 'he paid in coin'.
To manufacture coins by stamping metal, especially at a mint; also, figuratively, to invent or devise a new word, phrase, or expression.
"The Royal Mint coins millions of pounds sterling every year; separately, the writer coined a term that soon entered everyday speech."
In modern usage, the sense of inventing a word or phrase is far more common than the literal minting sense.
Regular plural; often used in the collective sense to mean loose change or small-denomination money.
"She collected all the coins from the bottom of her handbag to pay for coffee."
The phrase 'to coin a phrase' literally comes from the idea that minting words is like minting money — and it's now so overused that saying 'to coin a phrase' has become a self-aware joke.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of coin
'Coin' entered Middle English from Old French 'coigne' (a corner, wedge, or die used for stamping), which derives from Latin 'cuneus' meaning 'wedge' — the same root behind 'cuneiform', the wedge-shaped writing of ancient Mesopotamia, and behind the architectural term 'quoin'. Its earliest English sense related to stamping or coining money before settling on the stamped piece itself. Cognates appear in French ('coin', meaning corner) reflecting the shared Latin origin.
Related word forms
How coin is actually used
As a verb meaning to invent a word, 'coin' is neutral in register and common in journalism and academic writing. The noun covers both physical currency and figurative uses. In British informal usage, phrases like 'the other side of the coin' are idiomatic rather than literal.
Easily confused with coin
A coiner is a person who mints coins or invents words, whereas coin itself refers either to the metal currency or the act of invention.