mission

mission — noun

1. a specific task officially assigned to an individual or group to carry out in a

1.nounC2
Definition

a specific task officially assigned to an individual or group to carry out in a particular place, such as a military operation, a space flight, or a diplomatic assignment.

Example

A UN peacekeeping mission was sent to patrol the border between the two countries.

collocation: peacekeeping mission

Layla trained for two years before her first space mission aboard the International Space Station.

Common collocations
  • peacekeeping mission
  • rescue mission
  • combat mission
  • space mission
  • diplomatic mission
  • on a mission
  • mission to + infinitive
Synonyms
  • assignment

    more neutral, used in any work context; lacks the special or official weight of mission

  • operation

    often larger in scale and military in tone; an operation may contain several missions

  • task

    more general; a task can be small and routine, unlike a mission

Grammar Patterns

mission to + infinitive

Usage Note

Commonly paired with military or aerospace contexts; a mission is assigned and has a clear goal, unlike a general task or job.

Common Mistakes

The manager gave me a mission to finish the report by Friday.
The manager gave me the task of finishing the report by Friday.
'mission' implies a specific assigned operation, not everyday work.

2. a strong personal goal or purpose that someone believes they must achieve, often

2.nounB2
Definition

a strong personal goal or purpose that someone believes they must achieve, often driven by a sense of moral responsibility or deep commitment.

Example

Helping young people find jobs became Anong's personal mission after she saw so many struggling.

pattern: personal mission + to-infinitive

The team saw it as their mission to protect the local rainforest from being cut down.

Common collocations
  • personal mission
  • mission in life
  • sense of mission
  • make it one's mission
  • mission statement
Synonyms
  • calling

    stronger emotional and often spiritual pull; implies a divinely or morally inspired purpose

  • vocation

    focuses on career or profession as a form of service; less active than mission

  • purpose

    broader and less action-oriented; a purpose may be a reason for existing, not necessarily a task to do

Grammar Patterns

someone's mission + to-infinitive

Usage Note

Subject is usually a person or group describing their own strong sense of purpose. Distinguish from sense 1 (OFFICIAL TASK), which involves an external assignment from an authority.

Common Mistakes

My boss gave me a mission to improve sales.
I made it my mission to improve sales.
Sense 2 is about self-chosen purpose, not an assigned duty.

3. an expression used to announce that a task or operation has been finished succes

3.noun
Definition

an expression used to announce that a task or operation has been finished successfully, often after a long or difficult effort.

Example

After five hours of moving boxes into the new flat, Caleb sat down and grinned, “Mission accomplished!”

informal exclamation after completing a task

The team leader smiled and declared mission accomplished once the last section of the bridge was safe.

Common collocations
  • mission accomplished

Grammar Patterns

say/declare mission accomplished

Usage Note

Used playfully for everyday tasks as well as serious operations. The phrase became widely known from the 2003 U.S. military announcement aboard the USS Abraham Lincoln.

Common Mistakes

The project is done — mission accomplished!' (correct, but may sound ironic if problems remain)
We’ve finished the painting. Mission accomplished!
natural for casual settings.

4. a team dispatched to another country to represent a government, organisation, or

4.noun
Definition

a team dispatched to another country to represent a government, organisation, or church, including the physical site where they are based.

Example

The French trade mission opened a new office in Ho Chi Minh City to support local businesses.

collocation: trade mission

Renata joined a medical mission in Kenya that provides free eye surgery to remote villages.

Common collocations
  • trade mission
  • diplomatic mission
  • medical mission
  • religious mission
  • military mission
  • mission church
  • mission school
Synonyms
  • embassy

    specifically a diplomatic building; narrower and more formal than mission

  • delegation

    temporary group sent for talks, not a permanent presence like a mission

  • outpost

    any remote branch or settlement, not necessarily official or diplomatic

Grammar Patterns

mission + preposition phrase

Usage Note

Can refer either to the people (the diplomatic mission) or the physical building (the mission church). Context determines which meaning applies.

5. an undertaking, typically a journey or piece of work, that demands great effort

5.noun
Definition

an undertaking, typically a journey or piece of work, that demands great effort and a long period to finish.

Example

Getting the old computer to work again turned into quite a mission for Arjun.

informal: quite a mission

Filing all those tax documents before the deadline was a real mission for the office staff.

informal: a real mission

Common collocations
  • quite a mission
  • real mission
  • absolute mission
Synonyms
  • ordeal

    suggests suffering and discomfort rather than just effort

  • struggle

    emphasises difficulty overcoming obstacles rather than the task itself

Antonyms
  • breeze

    informal; something very easy

Grammar Patterns

be a (real/quite a) mission

Usage Note

Chiefly British informal use. Not used in formal writing. Avoid in academic or professional contexts.

Common Mistakes

Writing this report was a mission' in an academic essay.
Writing this report was challenging.
Use 'mission' only in casual spoken English (British).
Idioms

a city located near the Rio Grande in southern Texas, United States, with a population of approximately 77,000.

The family drove from San Antonio to Mission, Texas to visit relatives near the border.

Mission, Texas lies in the Rio Grande Valley and is known for its citrus farms and warm climate.

a municipality on the Fraser River in southwestern British Columbia, Canada, with a population of approximately 36,000.

Hiroko took the train from Vancouver to Mission, British Columbia to hike in the nearby mountains.

The Fraser River winds past Mission, British Columbia, providing water for local farms and wildlife.

Said when a task or goal has been successfully finished.

After fixing the leak, Tom said, "Mission accomplished."

Did you finish the report? Mission accomplished!

A task that is extremely difficult or cannot be done.

Getting a reservation at that restaurant on Friday is mission impossible.

For Sara, finishing the marathon in under three hours seemed mission impossible.

mission — verb

mission — adjective

Word family

Synonym discussion

Sense: noun/2

Mission, calling, vocation, and purpose all refer to a strong sense of direction in life, but they differ in scope and emotional weight. Mission emphasises an active duty or goal that someone feels compelled to carry out — it is task-focused and often self-assigned ('She made it her mission to improve local schools'). Calling carries a stronger emotional or spiritual pull, as if the role were divinely or morally appointed ('He felt a calling to become a priest'). Vocation is more career-focused, describing work that a person sees as a form of service rather than just a job ('Nursing was her true vocation'). Purpose is the broadest term: the reason something exists or the aim that gives life meaning, without requiring a specific task ('She found purpose in volunteering'). Use mission when you want to stress active effort toward a goal; use calling or vocation when the motivation feels deeper or more identity-defining.

Common collocations

Nouns

  • mission control
  • mission statement
  • mission objective
  • mission briefing

Phrases

  • mission of mercy
  • on a mission from
  • sense of mission
  • mission to + infinitive

Prepositions

Etymology

LatinFrenchEnglish

The word mission comes from Latin missio, meaning 'a sending out', which itself comes from mittere, 'to send'. It entered English through Old French mission in the 1500s, first used in a religious sense for sending missionaries abroad. By the 1600s it was also used for diplomatic assignments, and later for military and space operations. The modern sense of a personal calling or life purpose developed in the 1800s.