Question

answer me fast meaning of the word lunacy.

Answer 1

the state of being a lunatic; insanity (not in technical use).

"it has been suggested that originality demands a degree of lunacy"

synonyms: insanity, madness, mental illness, derangement, dementia, dementedness, insaneness, loss of reason, unsoundness of mind, mental instability, mania, frenzy, psychosis; informalcraziness

"the survivors descended into despair and lunacy

Answer 2

Lunacy means craziness,madness or mentally illness