Definitions

1. adjective

resembling or characteristic of hysteria, especially in being excessive or irrational

“Her hysterioid reaction to the news caused concern for those around her.”

2. noun

a person or thing that exhibits hysteria or excessive and irrational behavior

“The hysterioid outburst in the theater was a scene to behold.”

3. noun

a quality or characteristic that resembles hysteria, especially in being excessive or irrational

“The novel explores the hysterioid atmosphere of the small town.”