Disbelief (noun)

1. The state or feeling of not believing in something.
2. The state or feeling of not accepting something as true.
3. The state of being skeptical.

Origin:

Mid 16th century (also in the sense "unbelief"): from dis- (expressing negation) + belief.

Examples:

1. The news was met with disbelief.
2. She shook her head in disbelief.
3. He tried to hide his disbelief.
4. The disbelief of the public was reflected in the polls.
5. His disbelief was evident in his tone.