say it: hi-STER-ee-uh
hysteria is a noun meaning "state of violent mental agitation". It carries 3 recorded senses.
state of violent mental agitation
excessive or uncontrollable fear
neurotic disorder characterized by violent emotional outbreaks and disturbances of sensory and motor functions
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 hysteria 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.