decommission
C1/C2Formal, Technical, Official, Military, Business, Environmental
Definition
Meaning
To formally take (a piece of military equipment, a facility, a ship, or a nuclear reactor) out of active service.
To officially end the operation or use of something; to dismantle, shut down, or retire a system, device, or piece of infrastructure from its primary function.
Linguistics
Semantic Notes
The word carries a strong sense of official, planned, and often permanent withdrawal from service. It implies a formal process, often involving safety procedures, documentation, and sometimes dismantling. It is often used in contexts where the item being removed has served a long or critical purpose and its removal is significant.
Dialectal Variation
British vs American Usage
Differences
No significant difference in core meaning or usage. The term is equally common in both technical and formal registers in the UK and US.
Connotations
In the UK, its use in a nuclear context (decommissioning power stations) is highly prominent. In the US, it is also strongly associated with military hardware and environmental clean-up of industrial sites.
Frequency
Slightly higher frequency in British English due to extensive public discourse about nuclear decommissioning (e.g., Sellafield). In American English, frequent in military and industrial contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
[VN] (transitive verb + direct object)The government will decommission the old nuclear plant.The navy decommissioned the aircraft carrier last year.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[None directly associated. The word itself is often part of formal set phrases.]”
Usage
Context Usage
Business
Referring to the planned closure and dismantling of old industrial plants or IT systems.
Academic
Used in engineering, environmental science, and public policy papers discussing lifecycle management of infrastructure.
Everyday
Rare in casual conversation. Might be heard in news reports about closing power stations or naval ships.
Technical
The primary register. Used in military, nuclear energy, maritime, and heavy industry contexts with precise procedural meaning.
Examples
By Part of Speech
verb
British English
- The government has allocated funds to decommission the ageing Magnox reactors.
- The frigate was decommissioned in a ceremony at Portsmouth Naval Base.
American English
- The EPA ordered the company to decommission the contaminated chemical facility.
- The old battleship was decommissioned and turned into a museum.
adverb
British English
- [Not standard. Use 'during decommissioning' or 'as part of decommissioning'.]
American English
- [Not standard. Use 'during decommissioning' or 'as part of decommissioning'.]
adjective
British English
- The decommissioning costs for the North Sea oil platforms are enormous.
- A decommissioned railway line is now a walking path.
American English
- The decommissioned missile silo was sold to a private buyer.
- They studied the environmental impact of the decommissioning process.
Examples
By CEFR Level
- The old bus was taken out of service. (Concept introduced with simpler language.)
- The company will close the old factory next year.
- The authorities have plans to shut down and dismantle the nuclear power station.
- The complex and costly process to decommission the offshore oil platform will take a decade.
- International treaties sometimes require nations to decommission certain classes of weapons.
Learning
Memory Aids
Mnemonic
Think of 'de-' (reverse action) + 'commission' (to put into service). So, to decommission is to reverse the act of commissioning, i.e., to take out of service.
Conceptual Metaphor
LIFE-CYCLE (birth/commission → life/service → death/decommission), DISARMAMENT (decommissioning weapons).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'реконструкция' (reconstruction).
- Closer to 'выводить из эксплуатации' or 'утилизировать' (in a nuclear context).
- Not 'демонтировать' alone (dismantle) – decommission includes the formal act of withdrawal *before* dismantling.
Common Mistakes
- Using it for temporary closures (e.g., 'decommission the shop for repairs' – use 'close temporarily').
- Confusing it with 'decompose'.
- Using it intransitively (e.g., 'The plant will decommission' – must have an object or be passive: 'The plant will be decommissioned').
Practice
Quiz
In which context is the verb 'decommission' LEAST likely to be used?
FAQ
Frequently Asked Questions
'Decommission' is the official act of taking something out of service, which may then be followed by 'dismantling' (taking it apart). Decommissioning is the decision and process of ending service; dismantling is the physical act of disassembly.
Yes, in IT, 'decommissioning' refers to the formal process of retiring an old software system, server, or application, including data migration, archiving, and shutting down servers.
Primarily yes, due to its formal and procedural connotations. It's used for ships, plants, reactors, weapons systems, and large industrial equipment. It would sound odd for small, everyday items (e.g., you don't 'decommission' a toaster).
The noun is 'decommissioning' (the process) or 'decommission' can be used attributively (as in 'decommission plan'). The state of being decommissioned is described by the past participle 'decommissioned'.