say it: ri-ZURVZ
reserves is a noun meaning "civilians trained as soldiers but not part of the regular army". It is pronounced /ɹɪˈzɝvz/ — ri-ZURVZ. It carries one recorded sense.
civilians trained as soldiers but not part of the regular army
military
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 reserves 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.