Meaning of INSANITY in English

INSANITY

n. 25B6; noun

insanity runs in her family : MENTAL ILLNESS, madness, dementia; lunacy, instability; mania, psychosis; informal craziness.

it would be insanity to take this loan : FOLLY, foolishness, madness, idiocy, stupidity, lunacy, silliness; informal craziness.

Concise Oxford thesaurus English vocabulary.      Краткий оксфордский словарь английского языка тезаурус.