Bible Dictionaries
Lunacy

Webster's Dictionary

(1):

(n.) A morbid suspension of good sense or judgment, as through fanaticism.

(2):

(n.) 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.

Bibliography Information
Webster, Noah. Entry for 'Lunacy'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​l/lunacy.html. 1828.