a transparent piece of diamond that has been cut and polished and is valued as a precious gem very hard native crystalline carbon valued as a gem a parallelogram with four equal sides
an oblique-angled equilateral parallelogram a playing card in the minor suit that has one or more red rhombuses on it
"he led a small diamond"
"diamonds were trumps" the area of a baseball field that is enclosed by 3 bases and home plate the baseball playing field