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.
A thing or occurrence which initially causes fear, distress, etc. but which is subsequently recognized as being no cause for concern.
A mishap, an unlucky circumstance.
Bad luck, misfortune.
To undergo (a misfortune); to suffer (something unfortunate).