The Collaborative International Dictionary of English v.0.48:

Diamond \Di"a*mond\ (?; 277), n. [OE. diamaund, diamaunt, F.
   diamant, corrupted, fr. L. adamas, the hardest iron, steel,
   diamond, Gr. ?. Perh. the corruption is due to the influence
   of Gr. ? transparent. See Adamant, Tame.]
   1. A precious stone or gem excelling in brilliancy and
      beautiful play of prismatic colors, and remarkable for
      extreme hardness.
      [1913 Webster]

   Note: The diamond is native carbon in isometric crystals,
         often octahedrons with rounded edges. It is usually
         colorless, but some are yellow, green, blue, and even
         black. It is the hardest substance known. The diamond
         as found in nature (called a rough diamond) is cut, for
         use in jewelry, into various forms with many reflecting
         faces, or facets, by which its brilliancy is much
         increased. See Brilliant, Rose. Diamonds are said
         to be of the first water when very transparent, and of
         the second or third water as the transparency
         decreases.
         [1913 Webster]

   2. A geometrical figure, consisting of four equal straight
      lines, and having two of the interior angles acute and two
      obtuse; a rhombus; a lozenge.
      [1913 Webster]

   3. One of a suit of playing cards, stamped with the figure of
      a diamond.
      [1913 Webster]

   4. (Arch.) A pointed projection, like a four-sided pyramid,
      used for ornament in lines or groups.
      [1913 Webster]

   5. (Baseball) The infield; the square space, 90 feet on a
      side, having the bases at its angles.
      [1913 Webster]

   6. (Print.) The smallest kind of type in English printing,
      except that called brilliant, which is seldom seen.
      [1913 Webster]

   Black diamond, coal; (Min.) See Carbonado.

   Bristol diamond. See Bristol stone, under Bristol.

   Diamond beetle (Zool.), a large South American weevil
      (Entimus imperialis), remarkable for its splendid luster
      and colors, due to minute brilliant scales.

   Diamond bird (Zool.), a small Australian bird (Pardalotus
      punctatus, family Ampelid[ae].). It is black, with
      white spots.

   Diamond drill (Engin.), a rod or tube the end of which is
      set with black diamonds; -- used for perforating hard
      substances, esp. for boring in rock.

   Diamond finch (Zool.), a small Australian sparrow, often
      kept in a cage. Its sides are black, with conspicuous
      white spots, and the rump is bright carmine.

   Diamond groove (Iron Working), a groove of V-section in a
      roll.

   Diamond mortar (Chem.), a small steel mortar used for
      pulverizing hard substances.

   Diamond-point tool, a cutting tool whose point is
      diamond-shaped.

   Diamond snake (Zool.), a harmless snake of Australia
      (Morelia spilotes); the carpet snake.

   Glazier's diamond, a small diamond set in a glazier's tool,
      for cutting glass.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Diamond \Di"a*mond\ (?; 277), a.
   Resembling a diamond; made of, or abounding in, diamonds; as,
   a diamond chain; a diamond field.
   [1913 Webster] Diamond anniversary

WordNet (r) 3.0 (2006):

diamond
    n 1: a transparent piece of diamond that has been cut and
         polished and is valued as a precious gem
    2: very hard native crystalline carbon valued as a gem [syn:
       diamond, adamant]
    3: a parallelogram with four equal sides; an oblique-angled
       equilateral parallelogram [syn: rhombus, rhomb,
       diamond]
    4: a playing card in the minor suit that has one or more red
       rhombuses on it; "he led a small diamond"; "diamonds were
       trumps"
    5: the area of a baseball field that is enclosed by 3 bases and
       home plate [syn: baseball diamond, diamond, infield]
       [ant: outfield]
    6: the baseball playing field [syn: ball field, baseball
       field, diamond]

Moby Thesaurus II by Grady Ward, 1.0:

171 Moby Thesaurus words for "diamond":
   acceptable person, ace, adamant, agate, alexandrite, amethyst,
   aquamarine, archery ground, athletic field, badminton court,
   baseball field, basketball court, beryl, best bower,
   billiard parlor, bloodstone, boast, bone, bower, bowling alley,
   bowling green, brick, brilliant, capital fellow, carbuncle, cards,
   carnelian, catch, cement, chalcedony, chrysoberyl, chrysolite,
   citrine, clubs, concrete, coral, course, court, cricket ground,
   croquet ground, croquet lawn, deck, demantoid, deuce, diamonds,
   dummy, emerald, face cards, fairway, field, find, flint, flush,
   football field, full house, garnet, gem, gentleman, girasol,
   glaciarium, godsend, golf course, golf links, good fellow,
   good lot, good man, good person, good sort, good thing, good woman,
   granite, gridiron, gym, gymnasium, hand, harlequin opal,
   heart of oak, hearts, heliotrope, honest man, hyacinth, ice rink,
   infield, iron, jack, jade, jadestone, jargoon, jasper, jewel,
   joker, king, knave, lady, lapis lazuli, left bower, links, marble,
   mensch, moonstone, morganite, nails, oak, onyx, opal, outfield,
   oval, pack, pair, pearl, perfect gentleman, perfect lady, peridot,
   persona grata, picture cards, plasma, playground, playing cards,
   playing field, playroom, plum, polo ground, pool hall, poolroom,
   pride, pride and joy, prince, prize, putting green, queen,
   racecourse, racket court, real man, right sort, rink, rock,
   rose quartz, rough diamond, round, royal flush, rubber, ruby, ruff,
   sapphire, sard, sardonyx, singleton, skating rink, soccer field,
   spades, spinel, spinel ruby, squash court, steel, stone, straight,
   stretch, tennis court, topaz, track, treasure, trey, trick, trophy,
   trouvaille, trump, turf, turquoise, windfall, winner, worthy



V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

DIAMOND
       Development and Integration of Accurate Mathematical Operations
in Numerical Data-processing (ESPRIT)


The Free On-line Dictionary of Computing (30 December 2018):

Diamond

   One of five pedagogical languages based on Markov algorithms,
   used in "Nonpareil, a Machine Level Machine Independent
   Language for the Study of Semantics", B. Higman, ULICS Intl
   Report No ICSI 170, U London (1968).  (cf. Brilliant,
   Nonpareil, Pearl[3], Ruby[2]).


Easton's 1897 Bible Dictionary:

Diamond
   (1.) A precious gem (Heb. yahalom', in allusion to its
   hardness), otherwise unknown, the sixth, i.e., the third in the
   second row, in the breastplate of the high priest, with the name
   of Naphtali engraven on it (Ex. 28:18; 39:11; R.V. marg.,
   "sardonyx.")

     (2.) A precious stone (Heb. shamir', a sharp point) mentioned
   in Jer. 17:1. From its hardness it was used for cutting and
   perforating other minerals. It is rendered "adamant" (q.v.) in
   Ezek. 3:9, Zech. 7:12. It is the hardest and most valuable of
   precious stones.


U.S. Gazetteer Places (2000):

Diamond, IL -- U.S. village in Illinois
   Population (2000):    1393
   Housing Units (2000): 597
   Land area (2000):     1.582375 sq. miles (4.098332 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.582375 sq. miles (4.098332 sq. km)
   FIPS code:            19837
   Located within:       Illinois (IL), FIPS 17
   Location:             41.287699 N, 88.253824 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Diamond, IL
    Diamond


U.S. Gazetteer Places (2000):

Diamond, MO -- U.S. town in Missouri
   Population (2000):    807
   Housing Units (2000): 350
   Land area (2000):     0.664080 sq. miles (1.719958 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.664080 sq. miles (1.719958 sq. km)
   FIPS code:            19432
   Located within:       Missouri (MO), FIPS 29
   Location:             36.994573 N, 94.313826 W
   ZIP Codes (1990):     64840
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Diamond, MO
    Diamond