say it: DAHY-muhnd
diamond is a noun meaning "a transparent piece of diamond that has been cut and polished and is valued as a precious gem". It carries 6 recorded senses.
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
baseball
the baseball playing field
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for diamond come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.