a.

1. 歇斯底里的
   They became hysterical after the accident.

   事故發生後他們變得歇斯底里。

2. 情緒異常激動的
   a hysterical statement

   情緒激動的聲明

3. 【口】極可笑的
   The movie was hysterical. I couldn't stop laughing.

   那電影太滑稽了。我忍不住大笑。

adj.

1. wildly uncontrolled:
   the band were mobbed by hysterical fans.
   ▸informal extremely funny.
2. Psychiatry  associated with or suffering from hysteria.