Noun

(countable) A set of tasks that fulfills a purpose or duty; an assignment set by an employer.

(uncountable) Religious evangelism.

(uncountable) (the missions) collective term for third world charities, particularly those which preach as well as provide aid.

(countable) (Catholic tradition) an infrequent gathering of religious believers in a parish, usually part of a larger regional event with a central theme.

A number of people appointed to perform any service; a delegation; an embassy.

* Francis Bacon

In these ships there should be a mission of three of the fellows or brethren of Solomon's house.

(obsolete) dismissal; discharge from service

A work.

Noun

(activities)

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 movement.

Something done for pleasure or entertainment, especially one involving movement or an excursion.

* {{quote-magazine, date=2013-06-07, author=David Simpson

, volume=188, issue=26, page=36, magazine=(The Guardian Weekly) , title= Fantasy of navigation , passage=Like most human activities , ballooning has sponsored heroes and hucksters and a good deal in between. For every dedicated scientist patiently recording atmospheric pressure and wind speed while shivering at high altitudes, there is a carnival barker with a bevy of pretty girls willing to dangle from a basket or parachute down to earth.}}

Use (of internet, playstation, bank account etc.).