Event
Part of speech: noun
Definition: An occurrence of social or personal importance. A point in spacetime having three spatial coordinates and one temporal coordinate A possible action that the user can perform and is monitored by an application or the operating system (event listener). When an event occurs an event handler is called which performs a specific task. A set of some of the possible outcomes; a subset of the sample space.
Activity
Part of speech: noun
Definition: The state or quality of being active; nimbleness; agility; vigorous action or operation; energy; active force; as, an increasing variety of human activities.something done as an action or a movementsomething done for pleasure or entertainment, especially one involving movement or an excursion.Use (of internet, playstation, bank account etc.)