What does coupling mean in software engineering?

Coupling measures how much one software module or component depends on another. High coupling means modules are tightly connected and interdependent. Low coupling means they are independent with minimal connections. In software design, teams aim for low coupling because it makes code easier to test, maintain, and modify.

How do you use coupling in a sentence at work?

You typically use it with adjectives like tight, loose, high, or low. For example: We need to reduce coupling between the authentication and payment modules. Or: This service has tight coupling to the database, making it hard to scale.

Is coupling a formal or informal term?

Coupling is a formal technical term used in software architecture and engineering. It is standard terminology in code reviews, architecture discussions, and technical documentation. While not slang, it is professional and expected vocabulary in tech companies.

What is the opposite of coupling?

The opposite concepts are decoupling, modularity, and independence. Decoupling is the process of reducing coupling. A well-designed system has low coupling and high cohesion.

coupling meaning in tech — Speak Tech English

Commonness	4/5
Versatility	4/5
Formality	CasualFormalNeutral
Spoken ↔ Written	SpokenWrittenBoth
Directness ↔ Diplomatic	DirectDiplomaticDirect
Region	US and UK

Say it like this

✓We have too much coupling between these services.

✓The goal is to reduce coupling and increase cohesion.

✓Tight coupling makes refactoring painful.

Real examples

in a code review

"This database query is tightly coupled to the business logic. We should move it to a separate layer."

in an architecture meeting

"The main issue with our monolith is high coupling between the payment and inventory modules."

in a standup

"We refactored the API to reduce coupling, so now the mobile team can work independently."

Don't say this

Handle with care. Coupling is an architectural concept; do not confuse it with simply connecting two things together or romantic pairing. It refers specifically to code dependency.

✕We need to coupling the two functions together.

✓We need to reduce the coupling between these two functions.— Coupling is not a verb meaning to connect; it is a noun describing the level of dependency.

✕The coupling is working well now.

✓We have achieved low coupling, which is working well.— Coupling itself does not work or not work. You assess whether the level of coupling is good or bad.

✕Let us add more coupling to make it faster.

✓Let us reduce coupling to improve maintainability.— More coupling typically makes code harder to maintain and test, not faster.

Other forms

noun

coupling

"High coupling in this codebase is slowing us down."

adjective

coupled

"These components are tightly coupled and difficult to test independently."

Often used with

tight couplingUsed when modules are heavily dependent on each other; usually considered a problem.

loose couplingUsed when modules have minimal dependencies; generally a design goal.

reduce couplingThe common action phrase meaning to minimize dependencies between modules.

high couplingDescribes significant interdependency between components.

low couplingDescribes minimal interdependency; promotes modularity and testability.

Similar words

interdependencyMore general term; coupling is the technical term preferred in software architecture.

dependencyNarrower term referring to what one module depends on; coupling describes the strength of that relationship.

interconnectednessBroader term; coupling is more specific to code architecture.

Opposites

decouplingindependencemodularity

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Practice

Try it

4 quick exercises

Complete the sentence

1. The frontend and backend have high _______, so changes in one often break the other.

Spot the mistake

2. Which sentence uses coupling incorrectly?

We should aim for low coupling between microservices.The coupling makes it hard to test this module independently.We need to coupling the database to the API.Reducing coupling improves code maintainability.

Pick the most natural phrasing

3. Your senior engineer says the code has too many dependencies. How do you express this technically?

There is a lot of coupling in the codebase.The codebase has too many couplings.The couplings are very high.We have coupled too much code.

Rewrite naturally

4. Rewrite in technical English: We changed one thing and five other things broke because everything is stuck together.

Questions

Quick poll

Have you said "coupling" in a standup this week?

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