1. Something that happens : OCCURRENCE

  2. A noteworthy happening

  3. Designates a fact or a phenomenon insofar as it makes a break, that it marks [1]

Event Storming Context

Event are state transitions that [2]:

  1. Can be the result of some User Interaction

  2. May be triggered by some External System

  3. May be triggered by Time

  4. May be the result of some Cascading reaction

1. See sources: https://www.merriam-webster.com/dictionary/event and Vocabulaire Européen des Philosophies under the direction of Barbara Cassin. Edition du Seuil. Dictionaires Le Robert. ISBN 2-85-036-580-7