Meaning of DIAMOND in English

I. ˈdī(ə)mənd noun

( -s )

Etymology: Middle English diamaunt, diamaunde, from Middle French diamant, diamande, from Late Latin diamant-, diamas, alteration of (assumed) Vulgar Latin adimant-, adimas hardest iron or steel, diamond, from Greek adamant-, adamas


a. : native carbon crystallized in the isometric system often in the form of octahedrons with rounded edges and usually nearly colorless that when transparent and more or less free from flaws is highly valued as a precious stone because having high refractive and dispersive powers it shows when faceted a remarkable brilliance and play of prismatic colors and that when off-color or flawed is invaluable for industrial purposes (as for use in wire dies, abrasive powder, rock drills, and turning tools) because it is the hardest substance known (hardness 10, specific gravity 3.52) — see water 7a; brilliant 1, rose , table diamond ; bort

b. : a piece of this material

c. : a crystalline mineral that is like diamond in brilliance — used with a qualifying name; see alençon diamond

d. : crystallized carbon similar to the native but produced by artificial means

2. obsolete : a very hard substance : adamant


a. : something that resembles a diamond (as in value, rarity, or brilliance)

b. : a person possessing very high character or other fine qualities

4. : a square or rhombus-shaped configuration usually having a distinctive orientation (as by having a diagonal perpendicular to the horizontal)

5. : something shaped like a diamond ; specifically : any of the small diamond-shaped marks at regular intervals on the cushions of an American billiard table to aid the player in calculating the angles of his shots


a. : a red lozenge impressed on a playing card ; also : a card marked with such lozenges

b. diamonds plural but singular or plural in construction : the suit comprising cards so marked

c. bridge : an odd trick won or contracted for with diamonds trumps

four diamonds bid and made

7. : a tool holding a diamond ; specifically : any of several instruments varying in shape, size, and surfaces featuring diamond bonded on a metallic base and used typically in dental work and for cutting glass

8. : an old size of printing type (approximately 4 1/2 point) between brilliant and pearl — compare point system


a. : the area of a baseball or softball field enclosed in a square with a base at each corner — called also infield

b. : the entire playing field in baseball or softball

10. : something ornamented or set with a diamond ; specifically : an engagement ring set with a diamond solitaire

11. : rerailer

12. diamonds plural but singular in construction : diamond-skin disease

- diamond in the rough

II. adjective

1. : consisting or made of diamond

2. : bright , sparkling

the diamond dawn of a golden winter day — L.C.Stevens

3. : ornamented or set with a diamond

diamond tiara

4. : shaped like a diamond : having diamond-shaped figures or parts

diamond weave

5. : of, relating to, or marking a 60th or a 75th anniversary

III. transitive verb

( -ed/-ing/-s )

: to adorn with or as if with diamonds

the grass is diamonded with cobwebs of dew — Stuart Kinzie

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.