hysterical
1. [ adjective ] (psychology,psychiatry) characterized by or arising from psychoneurotic hysteria
Synonyms: hysteric
Examples:

"during hysterical conditions various functions of the human body are disordered"- Morris Fishbein "hysterical amnesia"

Related terms: neurotic
2. [ adjective ] marked by excessive or uncontrollable emotion
Examples:

"hysterical laughter" "a mob of hysterical vigilantes"

Related terms: agitated
Similar spelling:   hysterically
  hysteric
  hysteria
  hysterics
  hysteresis