1. (n.) A precious stone or gem excelling in brilliancy and beautiful play of prismatic colors, and remarkable for extreme hardness.

2. (n.) A geometrical figure, consisting of four equal straight lines, and having two of the interior angles acute and two obtuse; a rhombus; a lozenge.

3. (n.) One of a suit of playing cards, stamped with the figure of a diamond.

4. (n.) A pointed projection, like a four-sided pyramid, used for ornament in lines or groups.

5. (n.) The infield; the square space, 90 feet on a side, having the bases at its angles.

6. (n.) The smallest kind of type in English printing, except that called brilliant, which is seldom seen.

7. (a.) Resembling a diamond; made of, or abounding in, diamonds; as, a diamond chain; a diamond field.

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