Diamond (noun) Definition, Meaning & Examples

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noun
  1. a pure or nearly pure, extremely hard form of carbon, naturally crystallized in the isometric system.
  2. a piece of this stone.
  3. a transparent, flawless or almost flawless piece of this stone, especially when cut and polished, valued as a precious gem.
  4. a ring or other piece of jewelry containing such a precious stone, especially 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. crystallized carbon, or a piece of it, artificially produced.
  8. an equilateral quadrilateral, especially as placed with its diagonals vertical and horizontal; a lozenge or rhombus.
  9. any rhombus-shaped figure or object oriented with its diagonals vertical and horizontal.
  10. a red rhombus-shaped figure on a playing card.
  11. a card of the suit bearing such figures.
  12. the suit so marked: Diamonds is trump. Diamonds are trump.
  13. Baseball.
    • the space enclosed by home plate and the three bases; infield.
    • the entire playing field.
  14. a 4½-point type of a size between brilliant and pearl.
adjective
  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.
verb (used with object)
  1. to adorn with or as if with diamonds.
Idioms
  1. a person of fine character but lacking refined manners or graces.
noun
  1. U.S. singer and songwriter.
  2. a hill in Canada, in S Quebec, on the St. Lawrence River.
noun
    • 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
    • (as modifier)
  2. geometry
    • a figure having four sides of equal length forming two acute angles and two obtuse angles; rhombus
    • rhombic
    • a red lozenge-shaped symbol on a playing card
    • a card with one or more of these symbols or (when plural) the suit of cards so marked
  4. baseball
    • the whole playing field
    • the square formed by the four bases
  5. (formerly) a size of printer's type approximately equal to 4 1/2 point
  6. black diamond a figurative name for coal
  7. rough diamond
    • an unpolished diamond
    • a person of fine character who lacks refinement and polish
verb
  1. to decorate with or as with diamonds
    Diamond (noun) Definition, Meaning & Examples

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