noun
plural -monds
a very hard usually colorless stone that is a form of carbon and is used especially in jewelry [count]
see color picture
[count] :a shape that is formed by four equal straight lines and that has two opposite angles that are smaller than a right angle and two opposite angles that are larger than a right angle
[count] :a playing card that is marked with a red diamond shape
b diamonds [plural] :the suit in a deck of playing cards that is marked by red diamond shapes
[count] the part of a baseball field that includes the area within and around the three bases and home plate :infield
the entire playing field in baseball
adjective
always used before a noun
of or relating to the 60th or 75th anniversary of an important event (such as a marriage)
It is more common for diamond to refer to the 60th anniversary of something. - compare golden, silver
