UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈdaɪəmənd/US:USA pronunciation: IPA and respellingUSA pronuncation: IPA/ˈdaɪmənd, ˈdaɪə-/ ,USA pronunciation: respelling(dīmənd, dīə-)

WordReference Random House Learner's Dictionary of American English © 2020
dia•mond /ˈdaɪmənd, ˈdaɪə-/USA pronunciation   n. 
  1. Mineralogy a stone of pure and extremely hard crystallized carbon that when cut and polished is transparent, bright, and valued as a precious gem:[countable]Coal and diamonds are both made of carbon.
  2. Jewelry a piece of jewelry containing diamonds:[plural]She wore her diamonds.
  3. Mathematics[countable] a four-sided figure with sides of equal length but with no right angles.
  4. Games
    • [countable] a red figure shaped that way on a playing card.
    • [countable] a card bearing such figures:I had five diamonds.
    • diamonds, [uncountable;  plural;
      used with a singular or plural verb]
      the suit of playing cards marked this way:Diamonds is the suit that is bid.
  5. Sport[countable]
    • the infield or the entire playing field in baseball.

adj. [before a noun]
  1. made of or set with diamonds:a diamond ring.
  2. having the shape of a diamond.
  3. indicating the 60th or 75th event of a series, such as a wedding anniversary.
  1. Idiomsa diamond in the rough, [countable] a person or thing of great worth but unpolished or uncultivated.

WordReference Random House Unabridged Dictionary of American English © 2020
dia•mond  (dīmənd, dīə-),USA pronunciation  n. 
  1. Mineralogya pure or nearly pure, extremely hard form of carbon, naturally crystallized in the isometric system.
  2. a piece of this stone.
  3. Jewelrya transparent, flawless or almost flawless piece of this stone, esp. when cut and polished, valued as a precious gem.
  4. Jewelrya ring or other piece of jewelry containing such a precious stone, esp. an engagement ring.
  5. a piece of this stone used in a drill or cutting tool.
  6. a tool provided with such an uncut stone, used for cutting glass.
  7. Mineralogycrystallized carbon, or a piece of it, artificially produced.
  8. Mathematicsan equilateral quadrilateral, esp. as placed with its diagonals vertical and horizontal;
    a lozenge or rhombus.
  9. Mathematicsany rhombus-shaped figure or object oriented with its diagonals vertical and horizontal.
  10. Gamesa red rhombus-shaped figure on a playing card.
  11. Gamesa card of the suit bearing such figures.
  12. Gamesdiamonds, (used with a sing. or pl. v.) the suit so marked:Diamonds is trump. Diamonds are trump.
  13. Sport[Baseball.]
    • the space enclosed by home plate and the three bases;
    • the entire playing field.
  14. Printinga 4½-point type of a size between brilliant and pearl.
  15. Idiomsdiamond in the rough, a person of fine character but lacking refined manners or graces.

  1. made of or set with a diamond or diamonds.
  2. having the shape of a diamond:a dress with a diamond print.
  3. indicating the 75th, or sometimes the 60th, event of a series, as a wedding anniversary. See table under  wedding anniversary. 

  1. to adorn with or as if with diamonds.
diamond•like′, adj. 
  • Vulgar Latin *diamant-, stem of *diamas, perh. alteration of *adimas ( French aimant magnet, Old Provencal aziman diamond, magnet), for Latin adamas adamant, diamond
  • Old French
  • Middle English diamant 1275–1325

Dia•mond  (dīmənd, dīə-),USA pronunciation  n. 
  1. BiographicalNeil, born 1941, U.S. singer and songwriter.
  2. Place NamesCape, a hill in Canada, in S Quebec, on the St. Lawrence River.

Collins Concise English Dictionary © HarperCollins Publishers::
diamond /ˈdaɪəmənd/ n
  1. a colourless exceptionally hard mineral (but often tinted yellow, orange, blue, brown, or black by impurities), found in certain igneous rocks (esp the kimberlites of South Africa). It is used as a gemstone, as an abrasive, and on the working edges of cutting tools. Composition: carbon. Formula: C. Crystal structure: cubic
  2. (as modifier): a diamond ring
  3. a figure having four sides of equal length forming two acute angles and two obtuse angles; rhombus
  4. a red lozenge-shaped symbol on a playing card
  5. a card with one or more of these symbols or (when plural) the suit of cards so marked
  6. the whole playing field
  7. the square formed by the four bases
  1. (transitive) to decorate with or as with diamonds
Etymology: 13th Century: from Old French diamant, from Medieval Latin diamas, modification of Latin adamas the hardest iron or steel, diamond; see adamant
'diamond' also found in these entries:
Collocations: works in a diamond [exchange, mine], works in the diamond [trade, business, industry], a diamond [ring, bracelet, chain, necklace], more...

Forum discussions with the word(s) "diamond" in the title:

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