say it: kuhn-TEM-pur-er-eez
contemporaries is a noun meaning "all the people living at the same time or of approximately the same age". It carries one recorded sense.
all the people living at the same time or of approximately the same age
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 contemporaries 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.