Noun, Noun which may take the genitive case particle 'no'
lie; fib; falsehood; untruth
彼が言ったことが嘘であることが解った。What he said turned out to be false. mistake; error
Noun
unwise move; bad decision
Interjection (kandoushi)
no way!; unbelievable!; really?!
Colloquial
Also written 噓【うそ】