1 [mahyn]
a form of the possessive case of I used as a predicate adjective: The yellow sweater is mine.
something that belongs to me: Mine is the red car.
Archaic. my (used before a word beginning with a vowel or a silent h, or following a noun): mine eyes; lady mine.

before 900; Middle English; Old English mīn my; cognate with Old Norse mīn, German mein, Gothic meina; see me

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2 [mahyn]
an excavation made in the earth for the purpose of extracting ores, coal, precious stones, etc.
a place where such minerals may be obtained, either by excavation or by washing the soil.
a natural deposit of such minerals.
an abundant source; store: a mine of information.
a device containing a charge of explosive in a watertight casing, floating on or moored beneath the surface of the water for the purpose of blowing up an enemy ship that strikes it or passes close by it.
a similar device used on land against personnel or vehicles; land mine.
a subterranean passage made to extend under an enemy's works or position, as for the purpose of securing access or of depositing explosives for blowing up a military position.
a passageway in the parenchyma of a leaf, made by certain insects.
verb (used without object), mined, mining.
to dig in the earth for the purpose of extracting ores, coal, etc.; make a mine.
to extract coal, ore, or the like, from a mine.
to make subterranean passages.
to place or lay mines, as in military or naval operations.
verb (used with object), mined, mining.
to dig in (earth, rock, etc.) in order to obtain ores, coal, etc.
to extract (ore, coal, etc.) from a mine.
to avail oneself of or draw useful or valuable material from: to mine every reference book available in writing the term paper.
to use, especially a natural resource: to mine the nation's forests.
to make subterranean passages in or under; burrow.
to make (passages, tunnels, etc.) by digging or burrowing.
to dig away or remove the foundations of.
to place or lay military or naval mines under: to mine an enemy supply road.
Agriculture. to grow crops in (soil) over an extended time without fertilizing.
to remove (a natural resource) from its source without attempting to replenish it.

1275–1325; 1875–80 for def 5; (v.) Middle English minen < Old French miner (cognate with Provençal, Spanish minar, Italian minare) < Vulgar Latin *mīnāre, probably < a Celtic base *mein-; compare MIr méin, Welsh mwyn ore, mineral; (noun) Middle English < Middle French, perhaps noun derivative of miner; compare Medieval Latin mina mine, mineral

unmined, adjective

4. supply, stock, fund, hoard.


Mineral Engineer.


pronoun, nominative I, possessive my or mine, objective me; plural nominative we, possessive our or ours, objective us.
the nominative singular pronoun, used by a speaker in referring to himself or herself.
noun, plural I's.
(used to denote the narrator of a literary work written in the first person singular).
Metaphysics. the ego.

before 900; Middle English ik, ich, i; Old English ic, ih; cognate with German ich, Old Norse ek, Latin ego, Greek egṓ, OCS azŭ, Lithuanian aš, Sanskrit ahám

See me.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
i or I (aɪ)
n , pl i's, I's, Is
1.  the ninth letter and third vowel of the modern English alphabet
2.  any of several speech sounds represented by this letter, in English as in bite or hit
3.  a.  something shaped like an I
 b.  (in combination): an I-beam
4.  dot the i's and cross the t's to pay meticulous attention to detail
I or I

symbol for
Also called: j the imaginary number √--1

I1 (aɪ)
(subjective) refers to the speaker or writer
[C12: reduced form of Old English ic; compare Old Saxon ik, Old High German ih, Sanskrit ahám]

symbol for
1.  chem iodine
2.  physics current
3.  physics isospin
4.  logic A E Compare O a particular affirmative categorial statement, such as some men are married, often symbolized as SiP
5.  Roman numeral See Roman numerals one
abbreviation for
6.  Italy (international car registration)
[(for sense 4) from Latin (aff)i(rmo) I affirm]

mine1 (maɪn)
1.  something or someone belonging to or associated with me: mine is best
2.  of mine belonging to or associated with me
3.  (preceding a vowel) an archaic word for my : mine eyes; mine host
[Old English mīn; compare Old High German, Old Norse mīn, Dutch mijn]

mine2 (maɪn)
1.  a system of excavations made for the extraction of minerals, esp coal, ores, or precious stones
2.  any deposit of ore or minerals
3.  a lucrative source or abundant supply: she was a mine of information
4.  a device containing an explosive designed to destroy ships, vehicles, or personnel, usually laid beneath the ground or in water
5.  a tunnel or sap dug to undermine a fortification
6.  a groove or tunnel made by certain insects, esp in a leaf
7.  to dig into (the earth) for (minerals)
8.  to make (a hole, tunnel, etc) by digging or boring
9.  to place explosive mines in position below the surface of (the sea or land)
10.  to undermine (a fortification) by digging mines or saps
11.  another word for undermine
[C13: from Old French, probably of Celtic origin; compare Irish mein, Welsh mwyn ore, mine]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

12c. shortening of O.E. ic, first person sing. nom. pronoun, from P.Gmc. *ekan (cf. O.Fris. ik, O.N. ek, Norw. eg, Dan. jeg, O.H.G. ih, Ger. ich, Goth. ik), from PIE *ego(m) (cf. Skt. aham, Hitt. uk, L. ego, Gk. ego, Rus. ja). Reduced to i by 1137 in northern England, it began to be capitalized c.1250
to mark it as a distinct word and avoid misreading in handwritten manuscripts.
"The reason for writing I is ... the orthographic habit in the middle ages of using a 'long i' (that is, j or I) whenever the letter was isolated or formed the last letter of a group; the numeral 'one' was written j or I (and three iij, etc.), just as much as the pronoun." [Otto Jespersen, "Growth and Structure of the English Language," p.233]
The form ich or ik, especially before vowels, lingered in northern England until c.1400 and survived in southern dialects until 18c. The dot on the "small" letter -i- began to appear in 11c. L. manuscripts, to distinguish the letter from the stroke of another letter (such as -m- or -n-). Originally a diacritic, it was reduced to a dot with the introduction of Roman type fonts. The basic word for "I" in Japanese is watakushi, but it is not much used. Words that boys usually use are boku (polite) or ore (OH-ray), a rougher word, which can be rude depending on the situation. Girls usually use atashi (a feminine-sounding word) or the neutral watashi, but a tomboy might use boku like boys do.

O.E. min "mine, my," (pronoun and adj.), from P.Gmc. *minaz (cf. Goth. meins, O.N. minn, Du. mijn, Ger. mein "my, mine"), from the base of me. Superseded as adj. beginning 13c. by my.

c.1300, from O.Fr. mine, probably from a Celtic source (cf. Welsh mwyn, Ir. mein "ore, mine"), from O.Celt. *meini-. Italy and Greece were relatively poor in minerals, thus they did not contribute a word for this to Eng., but there was extensive mining from an early date in Celtic lands (Cornwall, etc.).
The verb meaning "to dig in a mine" is from c.1300.

"lay explosives," 1620s, in reference to old tactic of tunneling under enemy fortifications to blow them up; from mine (n.). The sense of "to dig under foundations to undermine them" is from late 14c., and miner in this sense is attested from late 13c. Related: Mined; mining.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary


  1. The symbol for the element iodine.

  2. iThe symbol for current.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
i   (ī)  Pronunciation Key 
The number whose square is equal to -1. Numbers expressed in terms of i are called imaginary or complex numbers.
  1. The symbol for electric current.

  2. The symbol for iodine.

mine   (mīn)  Pronunciation Key 
An underground excavation in the Earth from which ore, rock, or minerals can be extracted.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Abbreviations & Acronyms
imaginary unit
  1. current

  2. ice

  3. incomplete

  4. institute

  5. intelligence

  6. interstate

  7. iodine

  8. isospin

  9. Italy (international vehicle ID)

  10. 1

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Bible Dictionary

Mine definition

The process of mining is described in Job 28:1-11. Moses speaks of the mineral wealth of Palestine (Deut. 8:9). Job 28:4 is rightly thus rendered in the Revised Version, "He breaketh open a shaft away from where men sojourn; they are forgotten of the foot [that passeth by]; they hang afar from men, they swing to and fro." These words illustrate ancient mining operations.

Easton's 1897 Bible Dictionary
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American Heritage
The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Encyclopedia Britannica


in military and naval operations, a usually stationary explosive device that is designed to destroy personnel, ships, or vehicles when the latter come in contact with it. Submarine mines have been in use since the mid-19th century; land mines did not become a significant factor in warfare until a hundred years later.

Learn more about mine with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
The disused iron mine is a popular tourist attraction.
Army is testing a new technology for land mine detection that is based on the
  use of sound waves.
Humour does not get much blacker than laughter in a collapsed coal mine.
Mine is sealed up tight in a far corner of the garden.
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