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| 1. | of, pertaining to, or characterized by hysteria. |
| 2. | uncontrollably emotional. |
| 3. | irrational from fear, emotion, or an emotional shock. |
| 4. | causing hysteria. |
| 5. | suffering from or subject to hysteria. |
| 6. | causing unrestrained laughter; very funny: Oh, that joke is hysterical! |