• WordNet 3.6
    • n lunacy foolish or senseless behavior
    • n lunacy obsolete terms for legal insanity
    • ***
Webster's Revised Unabridged Dictionary
    • Lunacy A morbid suspension of good sense or judgment, as through fanaticism.
    • Lunacy 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. "Your kindred shuns your house
      As beaten hence by your strange lunacy ."
    • ***
Century Dictionary and Cyclopedia
    • n lunacy The kind of intermittent insanity formerly supposed to be subject to the change's of the moon; hence, madness in general; any unsoundness of mind. See insanity.
    • n lunacy In law, unsoundness of mind sufficient to incapacitate for civil transactions. The usual test is incapacity to manage one's own property and affairs.
    • n lunacy Synonyms Derangement, Craziness, etc. See insanity.
    • ***
Chambers's Twentieth Century Dictionary
    • ns Lunacy a kind of madness formerly supposed to be affected by the moon: insanity
    • ***


  • Horace
    “Anger is a brief lunacy.”
  • George Orwell
    “What can you do against the lunatic who is more intelligent than yourself, who gives your arguments a fair hearing and then simply persists in his lunacy?”


Webster's Revised Unabridged Dictionary
See Lunatic
Chambers's Twentieth Century Dictionary
L. lunarisluna, the moon—lucēre, to shine.


In literature:

Not long ago I heard that he was going to issue a writ of lunacy against me, in order to get me and my property into his possession.
"Flora Lyndsay" by Susan Moodie
It seemed to her sheer lunacy to travel over icy mountains with what appeared to be enough food for a traveling circus.
"Colorado Jim" by George Goodchild
Lunacy, origin and signification of, 251, 252.
"Popular Education" by Ira Mayhew
And there he lay quaking for a long time, while the lunacy of his adventure coarsely and unsentimentally revealed itself.
"The Rough Road" by William John Locke
The whole thing, stuck there and filling the small back-court, was a nightmare of crazy carpentry, a lunacy in the sun's eye.
"Merry-Garden and Other Stories" by Sir Arthur Thomas Quiller-Couch
Was there ever greater lunacy in public affairs?
"British Socialism" by J. Ellis Barker
Its glorious lunacy lifted it above ordinary human methods.
"The Belovéd Vagabond" by William J. Locke
But in his red eyes the flame of lunacy was slowly mounting.
"Louisiana Lou" by William West Winter
I used to be one of his staunchest supporters, but I draw the line at lunacy.
"Ireland as It Is" by Robert John Buckley (AKA R.J.B.)
I should have taken a degree in madness and been raised to a professor's chair in some college of lunacy!
"Hidden Hand" by Emma Dorothy Eliza Nevitte Southworth

In poetry:

Or shrieking Agony, with writhing brow,
Convulsive sending forth the hollow groan?
Or raving Lunacy, with harrowing moan,
Beseeching useless Pity for its woe?
"To Oblivion" by Charlotte Dacre
Three years! Three years! And it has scarce begun!
Three years of waste and wretchedness and woe,
Since one man's lunacy put back the sun.
Yet — were we happier three years ago?
"Three Years" by A P Herbert

In news:

GOP scheme to convert Medicare to voucher program is lunacy .
Delicious food, visual lunacy in Cuyahoga Falls.
Lunacy in Luna's education proposals.
The Lunacy of Our Retreat from Space The moon, once a mystery and muse, is now a nightly rebuke.
'Taken' by the lunacy of a script.
The lunacy surrounding the lease of the Toll Road continues, and I just wonder if politicians ever listen to themselves speak.
Airs of War and Lunacy .
(click the " Lunacy Limbo Part I" link for a larger picture).
Bordering on lunacy : Arizona turns police into immigration cops.
Now it's lunacy -- literally.
Apparently the only way of proving passionate interest these days is to commit some act of outright lunacy , preferably one that involves physical violence and mayhem.
Examples of Republican hypocrisy (or lunacy, to be charitable) on health care (and almost any other topic important to the nation's well-being) are too numerous to cite.
Lending Lunacy Can't Be Repeated .
In the midst of NHL lunacy, a one-night reprieve .
Two days of lunacy at Shipstern's Bluff.