in the event of

noun

1. something that happens or is regarded as happening; an occurrence, especially one of some importance.
2. the outcome, issue, or result of anything: The venture had no successful event.
3. something that occurs in a certain place during a particular interval of time.
4. Physics. in relativity, an occurrence that is sharply localized at a single point in space and instant of time.Compare world point.
5. Sports. any of the contests in a program made up of one sport or of a number of sports: The broad jump event followed the pole vault.

noun

1. anything that takes place or happens, esp something important; happening; incident
2. the actual or final outcome; result (esp in the phrases in the event, after the event)
3. any one contest in a programme of sporting or other conteststhe high jump is his event
4. philosophy
   1. an occurrence regarded as a bare instant of space-time as contrasted with an object which fills space and has endurance
   2. an occurrence regarded in isolation from, or contrasted with, human agencyCompare act (def. 8)
5. in any event or at all events regardless of circumstances; in any case
6. in the event of in case of; if (such a thing) happensin the event of rain the race will be cancelled
7. in the event that if it should happen that

verb

8. to take part or ride (a horse) in eventing