noun

1. 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.

   “The saw is coated with diamond.”

2. A gemstone made from this mineral.

   “The dozen loose diamonds sparkled in the light.”

3. A ring containing a diamond.

   “What a beautiful engagement diamond.”

Synonyms: ball field, baseball field, baseball diamond, infield, sparkler, 2-iamond, lozenge, rhomb

verb

1. To adorn with or as if with diamonds

adjective

1. Made of, or containing diamond, a diamond or diamonds.

   “He gave her diamond earrings.”

2. Of, relating to, or being a sixtieth anniversary.

   “Today is their diamond wedding anniversary.”

3. Of, relating to, or being a seventy-fifth anniversary.

   “Today is their diamond wedding anniversary.”