lunacy

• 名词，指法律上已过时的“精神失常”概念，现多指愚蠢、荒唐或毫无意义的行为。

A noun referring to an outdated term for legal insanity, or more commonly, to foolish or senseless behavior.

不可数

1. Legal Insanity (Obsolete)C2formal

   An outdated legal term for a state of mental illness that renders a person unable to manage their own affairs or be held responsible for their actions.

   法律上的精神失常（过时）

   • In the 19th century, a commission was appointed to inquire into the state of his lunacy.
   • The old law used the term 'lunacy' to describe what is now called legal insanity.
   • Historical records show that she was confined due to lunacy.

   同义词derangementinsanitymadness

2. Foolish or Senseless BehaviorB2informal

   Extremely foolish, irrational, or reckless actions that defy common sense.

   疯狂行为

   • It would be sheer lunacy to drive in this blizzard.
   • The decision to invest all their savings in that risky scheme was pure lunacy.
   • Only lunacy could explain why he jumped off the roof into the pool.

   同义词absurditycrazinessfollyfoolishnessidiocyinsanityirrationalitymadnessnonsensestupidity

   反义词judgmentprudencerationalityreasonsanitysensewisdom