say it: AM-pur
ampere is a noun meaning "a former unit of electric current (slightly smaller than the SI ampere)". It carries 2 recorded senses.
a former unit of electric current (slightly smaller than the SI ampere)
the basic unit of electric current adopted under the Systeme International d'Unites
“a typical household circuit carries 15 to 50 amps”
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 ampere 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.