A situation which, contrary to expectation, turned out to be uninteresting, unimportant or unexciting; an anticlimax. / A publicised event which does not take place.

(finance) A significant default on a financial instrument or some other financial occurrence, such as bankruptcy, restructuring, repudiation, or moratorium, or failure to pay some other obligation, such as taxes.

(cosmology, astronomy) An occurrence which causes the end of the universe or which destroys the planet earth; a global cataclysm.

(idiomatic) A deviation from the expected course of events.

A transmitter encodes data by producing a signal which is a continuous stream of signalling events each which has sufficient information for the receiver to recover the original data. Just like a quantum leap is the smallest measurable leap, a signalling event is the smallest possible amount of signal that the receiver needs to recover the original data without error.

prediction market

plural of blessed event

A public event such as a ballgame, parade, or festival that requires transportation planning, especially including roadway closure, and often a city permit in consequence.

plural of non-event

A particularly shocking medical error that should never occur.