An example or the act of disappointing: a circumstance in which a positive expectation is not achieved.
The feeling or state of being disappointed: a feeling of sadness or frustration when something is not as good as one hoped or expected, or when something bad unexpectedly happens.
Something or someone that disappoints: that which causes disappointment.
A thing or occurrence which initially causes fear, distress, etc. but which is subsequently recognized as being no cause for concern.
A warning signal (such as the call of sentry, the ringing of a bell, or the shriek of a siren) which turns out to have been given erroneously.