say it: ROO-bee
ruby is a noun and adjective meaning "a transparent piece of ruby that has been cut and polished and is valued as a precious gem". It carries 4 recorded senses.
a transparent piece of ruby that has been cut and polished and is valued as a precious gem
a transparent deep red variety of corundum; used as a gemstone and in lasers
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 ruby 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.