n a drug (trade names Atarax and Vistaril) used as a tranquilizer to treat anxiety and motion sickness
2
a turning point, inflection point, or event that, in retrospect, turns out to have led to the doom and demise of a once-powerful company, person or organization.\r \r DERIVATIVES:\r vistastrous
3
adv.\r > "Have you seen Speed Racer? It's a total vistaster."
