lunacy
/ˈluː.nə.si/ noun
Forms lunacies
- noun A cyclical mental disease, apparently linked to the lunar phases.
- noun Insanity implying legal irresponsibility.
- noun Something deeply misguided.
Synonyms
insanity madness craziness craze insaneness folly foolery tomfoolery indulgence
Etymology
From lun(atic) + -acy.
Webster’s 1913
- noun Insanity or madness; properly, the kind of insanity which is broken by intervals of reason, --formerly supposed to be influenced by the changes of the moon; any form of unsoundness of mind, except idiocy; mental derangement or alienation. Brande. Burrill.
- noun A morbid suspension of good sense or judgment, as through fanaticism. Dr. H. More.
Etymology [See Lunatic.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “lunacy”, CC BY-SA 4.0. Details