Mission vs Operation

When to use each in English, with meaning, register, and examples.

Mission

Top 1,000 (very common)B2noun

Operation

Top 2,000 (common)B1noun
Most common: Mission
 MissionOperation
Pronunciation🇬🇧 /["/ˈmɪʃn/"]/🇺🇸 /["/ˈmɪʃn/"]/🇬🇧 /["/ˌɒpəˈreɪʃn/"]/🇺🇸 /["/ˌɑːpəˈreɪʃn/"]/
MeaningA specific task or purpose that someone is trying to achieve.A task or activity that is done to achieve a goal.
ExampleThe team's mission was to develop a new strategy for the upcoming project.The operation was scheduled for early morning.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR levelB2B1
Part of speechnounnoun
Collocationsjoint, covert, secret, carry out, conduct, execute, end in failure, fail, be a success, objective, accomplishment, on a/​the mission, mission impossible, diplomatic, military, trade, establish, set up, send, mission to, Christian, educational, establish, found, run, work, hospital, school, Christian, educational, establish, found, run, work, hospital, school, main, primary, stated, have, pursue, fulfil/​fulfill, statement, a man with a mission, a woman with a mission, a sense of mission, joint, covert, secret, carry out, conduct, execute, end in failure, fail, be a success, objective, accomplishment, on a/​the mission, mission impossible, shuttle, space, spacecraft, go on, make, abort, control, on a/​the mission, mission tomajor, minor, small, have, undergo, come through, during a/​the operation, operation for, operation on, big, large-scale, major, begin, launch, mount, during a/​the operation, a theatre/​theater of operations, big, large-scale, major, begin, launch, mount, during a/​the operation, a theatre/​theater of operations, big, large-scale, major, begin, launch, mount, during a/​the operation, a theatre/​theater of operations, effective, efficient, smooth, come into, bring something into, put something into, during operation, in operation, in full operation, into full operation, big, large-scale, major, begin, launch, mount, during a/​the operation, a theatre/​theater of operations
Antonymsinactivity, idleness, lethargydisruption, inaction
Common mistakesConfused with 'emission', which refers to the release of something, especially gas., Using 'mission' when a different term like 'objective' would be more appropriate., Not distinguishing between 'mission' and 'task'; a mission can involve multiple tasks.'Operation' used incorrectly to mean 'operation table' or 'operation room'., Confused with 'operation' as a synonym for 'procedure' in informal settings., Omitting the noun that follows 'operation', e.g., saying 'operation is' instead of 'operation of machinery is'.
Usage notesUsed in both formal and informal contexts. In formal settings, it often refers to organizational goals, while in informal settings, it can refer to personal goals or tasks.Used in various contexts such as business, military, and mathematics. It may seem too formal for casual conversation.

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Operation

Frequently asked questions: Mission vs Operation

What's the difference between Mission and Operation?

Mission: A specific task or purpose that someone is trying to achieve. Operation: A task or activity that is done to achieve a goal.

Which is more common: Mission and Operation?

Mission is the most common in everyday English.

Are Mission and Operation the same CEFR level?

Mission: B2, Operation: B1 on the CEFR scale.

Can I use Mission and Operation interchangeably?

Not always. Mission and Operation are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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