mine
Noun pluralmines
Pluralmines
- 1The one or ones belonging to me; also used after of ("a friend of mine").
Those muddy boots on the porch are mine, not Dad's.
She forgot her umbrella, so I lent her mine for the walk home.
UsageNo noun follows it: my coat, but the coat is mine. The verb agrees with what it replaces: mine are here.
- 2
- 3An excavation, often a system of underground tunnels, from which ore or solid minerals are extracted.
The copper mine employed most of the town's residents.
Rescue teams reached the trapped workers deep inside the mine.
UsageOften in compounds: coal mine, gold mine, mine shaft.
Similarpit
Note
This noun is a different word from the possessive, despite the spelling. A mine may run underground through shafts or lie open to the sky, as open-pit mines do. Its parts include the mine shaft (or mineshaft) and the mine car.
Checked 2 Nov 2026 · 3 facts
- Underground mines may be accessed through shafts. en.wikipedia.org
- Open-pit mines are surface excavations open to the sky. fr.wiktionary.org
- Mine shaft, mineshaft, and mine car are listed as parts associated with a mine. en.wiktionary.org
- 4A device designed to explode when stepped on, touched, or approached by a ship, vehicle, or person.
Engineers carefully cleared each mine from the road before the convoy passed.
A floating mine struck the ship's hull near the bow.
UsageCommon phrases: step on a mine, lay mines, clear mines; the area is a minefield.
Note
Military usage sorts these devices by where they wait. On land, a foot or a wheel sets them off; at sea, floating mines threaten ships. An area sown with them is a minefield. In May 1940 the Railway Magazine listed floating mines with pack ice, snow and fog among the hazards that suspended most of Denmark's train ferries.
Checked 3 Nov 2026 · 5 facts
- Military usage distinguishes mines employed on land from those employed at sea. govinfo.gov
- Land mines can be triggered by a person's foot or a vehicle's wheel. govinfo.gov
- Floating mines threaten ships. govinfo.gov
- An area containing laid mines is a minefield. en.wiktionary.org
- The May 1940 Railway Magazine report about Denmark listed pack ice, snow, fog and floating mines as causes of railway disruption and reported that most train ferry services were suspended. en.wiktionary.org
- 5
- 6To earn new units of a cryptocurrency by performing the required computational calculations.
Enthusiasts mine various coins using racks of specialized hardware.
She mines a lesser-known cryptocurrency on a rig with several graphics cards.
Note
Finance and computing share this verb, which treats new coins as ore dug from the ground. The calculations are the digging, and the reward is newly issued units. Andrew Ross Sorkin's "Bitcoin's Climate Problem" in The New York Times (2021) shows the debate the word now carries, over the carbon footprint of the computers that mine bitcoins.
Checked 31 Oct 2026 · 4 facts
- Cryptocurrency mining uses an analogy with extracting valuable material from the ground. bitcoin.org
- Mining involves computational calculations rewarded with newly issued cryptocurrency. bitcoin.org
- Andrew Ross Sorkin's 'Bitcoin's Climate Problem' appeared in The New York Times in 2021; the cited publication date is March 9. en.wiktionary.org
- The article discusses debate over Bitcoin mining's carbon footprint. en.wiktionary.org
Less common meanings
- 7A plentiful source of wealth, resources, or valuable things.
The interview proved a mine of insight into the company's early years.
For collectors, the old attic was a mine of forgotten treasures.
UsageMostly in a mine of information, as praise.
Similarwealth, storehouse, fund, fount
Note
The figure turns a person or a book into something that yields riches when dug into. Modern Railways in December 1962 called Cook's Continental Guide "always a mine of accurate information." It is a compliment, and it suits sources that reward patient searching.
Checked 2 Nov 2026 · 1 fact
- Modern Railways, December 1962, described Cook's Continental Guide as "always a mine of accurate information." en.wiktionary.org
- 8My house or home.
Everyone gathered at mine for the holidays.
Let's grab a coffee and then head back to mine.
UsageAfter at, to or back to: round at mine, back to mine.
- 9To lay explosive mines in an area, or to damage or destroy something with a mine.
Retreating forces mined the bridges and the roads leading north.
Commanders chose to mine the entire valley before dawn.
Note
With this verb the object can be an area or structure that receives explosives, such as a road, a bridge or a harbor; an area sown with mines is a minefield. When the object is the ship or vehicle that strikes one, the verb means damage instead, often in the passive: the destroyer was mined. Only context separates the two uses.
Checked 31 Oct 2026 · 2 facts
- The object can also be water, such as a harbour, or a structure prepared for demolition. army.mil
- A bridge can be mined for deliberate demolition; this does not necessarily create a minefield. lonesentry.com
- 10A computer, or an array of computers, set up to perform the calculations that generate new units of a cryptocurrency and confirm transactions.
The company turned an empty factory into a bitcoin mine, filling it with rows of humming computers.
Neighbors complained about the nonstop roar of cooling fans coming from the crypto mine down the road.
Similarfarm
Note
Computing borrowed the whole picture: the coins are the ore, and the hardware that extracts them is the mine. The word names the machine or the network of machines, not a place in the ground. Electricity is its weak point, and some blockchains have changed their rules partly to cut the power such mines draw. The activity itself is the cryptocurrency verb.
Checked 31 Oct 2026 · 3 facts
- Cryptocurrency mining borrows the imagery of extracting valuable minerals. bitcoin.org
- Mining's energy consumption has prompted changes to blockchain rules, including Ethereum's replacement of mining with staking. ethereum.org
- FairCoin provides another example of a blockchain changing its consensus mechanism to reduce energy consumption. fair-coin.org
- 11
- 12A tunnel dug toward or beneath enemy lines and then packed with explosives.
For months, soldiers secretly dug a mine beneath the enemy trenches and packed it with explosives.
The defenders dug counter-tunnels to intercept the enemy's mines.
Note
In siege warfare the original mine was a tunnel, not a device. Diggers drove it under the enemy's works and packed the end with explosives. At Petersburg in July 1864, Union troops blew up a mine under the Confederate lines, opening the Battle of the Crater. The digging itself has a verb, to undermine walls, and the self-contained explosive device shares the name.
Checked 31 Oct 2026 · 3 facts
- The military mine was originally an excavation beneath fortifications, preceding the explosive-device sense. english-heritage.org.uk
- Explosive siege mining involved tunnelling beneath enemy works and placing explosives at the tunnel's end. gutenberg.org
- Union troops exploded a tunnel mine beneath Confederate positions at Petersburg in July 1864, initiating the Battle of the Crater. nps.gov
- 13Archaic: my, used before a vowel sound or after the noun.
Mine eyes grow heavy as the candle burns low.
'Thou art mine enemy,' the actor thundered, drawing his wooden sword.
Note
Older English treated the possessive much like a and an, using the full form before a vowel sound. Julia Ward Howe's "Battle Hymn of the Republic" (1862) keeps it in "Mine eyes have seen the glory." Mine host lingers as a set phrase, and The Packard Magazine still uses it in 1930. It can also follow its noun in old poetic style, as in mother mine.
Checked 31 Oct 2026 · 5 facts
- Historically, my and mine alternated before consonants and vowels, analogously to a and an. en.wikipedia.org
- Julia Ward Howe wrote Battle Hymn of the Republic, published in 1862. tile.loc.gov
- The poem begins with the quoted words. en.wikisource.org
- The Packard Magazine used mine host in 1930. en.wiktionary.org
- Mine can follow its noun in poetry, including mother mine. en.wikisource.org
- 14To dig away the ground or foundation beneath something in order to weaken or collapse it.
Rather than storm the gate, the besiegers chose to mine the walls, tunneling beneath them and carting away earth until the stones began to sag.
Over several weeks the sappers mined the corner tower, hollowing out the ground beneath it and holding it up with wooden props until they set the props on fire.
Note
A siege verb, close to sap and undermine, it means to dig away what holds something up or to tunnel beneath it and fill the gap with powder. John Hayward, writing before 1628, says simply "They mined the walls." Scott's Waverley (1814) applies it to great trees packed with gunpowder. From this image comes slow, secret ruin.
Checked 31 Oct 2026 · 6 facts
- This sense means undermining a foundation, including military mining with explosives, and is synonymous with sap and undermine. en.wiktionary.org
- John Hayward's writing predates 1628. en.wikipedia.org
- Hayward used the words They mined the walls. en.wiktionary.org
- Walter Scott's Waverley was first published in 1814. nls.uk
- Waverley uses mined for trees hollowed out and charged with gunpowder. gutenberg.org
- The figurative sense of gradual or secret destruction extends from the literal undermining sense. en.wiktionary.org
- 15
- 16To pick one's nose.
Note
The slang extends the digging verb to a finger in the nostril. It belongs to jokes, teasing and casual talk among friends or children, and in any other setting it is better left unsaid. Because the verb has respectable senses too, the joke works only when the context makes it plain.
- 17The tunnel or hollow patch an insect larva makes as it feeds inside a leaf, between its outer layers.
- 18A firework that explodes at ground level, shooting a burst of sparks or stars upward.
Showing meanings only.
Practice
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Origins
From Middle English min, from Old English mīn, going back through Proto-Germanic *mīnaz to Proto-Indo-European *méynos. It is related to Dutch mijn, German mein, and Danish, Swedish and Norwegian min.
Checked 1 Nov 2026 · 2 facts
- Mine derives from Middle English min and Old English mīn, through Proto-Germanic *mīnaz to Proto-Indo-European *méynos. en.wiktionary.org
- Mine is related to Dutch mijn, German mein, and Danish, Swedish and Norwegian min. en.wiktionary.org
The word goes back to Proto-Celtic *meinis ("ore, metal"), which gave a Gaulish word (compare Welsh mwyn and Irish mianach, "ore"). Late Latin took this as mina, Old French had mine, and from there it passed into Middle English.
Checked 1 Nov 2026 · 5 facts
- The ultimate source is reconstructed Proto-Celtic *meinis, meaning ‘ore, metal’. en.wiktionary.org
- The borrowing chain includes a Gaulish descendant of Proto-Celtic *meinis. en.wiktionary.org
- Welsh mwyn is a related word meaning ‘ore’. en.wiktionary.org
- Irish mianach is a related word meaning ‘ore’. en.wiktionary.org
- Gaulish supplied Late Latin mina, which became Old French mine and was borrowed into Middle English. en.wiktionary.org