- hys|ter|i|cal «hihs TEHR uh kuhl», adjective.1. unnaturally excited or emotional; resembling or suggesting hysteria: »
hysterical weeping.2. showing an extreme lack of control; unable to stop laughing, crying, or other emotional display; suffering from hysteria: »
This hysterical girl was unable to stop her violent laughing and crying.3. of hysteria; having to do with or characteristic of hysteria: »
a hysterical fit.4. Informal, Figative. very funny: »
Isn't that picture hysterical!–hys|ter´i|cal|ly, adverb.
Useful english dictionary. 2012.