A proper noun "diamond" refers to various places in the united states, including historical settlements, unincorporated communities, villages, townships, and a minor city.

(uncountable) A glimmering glass-like mineral that is an allotrope of carbon in which each atom is surrounded by four others in the form of a tetrahedron.

A gemstone made from this mineral.

A ring containing a diamond.

A very pale blue color.

(heraldry) Sable, when blazoning by precious stones.

Something that resembles a diamond.

(geometry) A rhombus, especially when oriented so that its longer axis is vertical.

(geometry) The polyiamond made up of two triangles.

(baseball) The entire field of play used in the game.

(baseball) The infield of a baseball field.

(card games) A card of the diamonds suit.

to adorn with or as if with diamonds

made of, or containing diamond, a diamond or diamonds.

of, relating to, or being a sixtieth anniversary.

of, relating to, or being a seventy-fifth anniversary.

(slang) First-rate; excellent.