Answer 1

A happening, the arrival of a significant point in time, a change in status of something or the occurrence of something external that causes the business to react

Answer 2

An occurrence of a particular condition (which may be internal or external to the
workflow management system) which causes the workflow management software to
take one or more actions. For example the arrival of a particular type of email message
may cause the workflow system to start an instance of a specific process definition.

Answer 3

Something that happens during a process.

Answer 4

An occurrence of a particular condition (which may be internal or external to the workflow management system) which causes the workflow management software to take one or more actions. For example the arrival of a particular type of email message may cause the workflow system to start an instance of a specific process definition. An event has two elements:
A Trigger, or cause, which is the recognition of some predefined set of circumstances associated with the operation of the system, which causes a particular action to be taken
The Action (or response) – which is the pre-defined system response following a trigger condition

Answer 5

Something that happens

Notes: At the risk of stating the obvious, events and business rules are not the same thing. A flash point for a business rule, on the other hand, is an event