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Technical Vocabularynoun · /ˈmɒnəlɪθ/

monolith

In simple English

In software architecture, a monolith is a traditional application design where all features, modules, and functions are combined into one large codebase and deployed as a single unit. For example, an e-commerce platform might have user authentication, product catalog, shopping cart, and payment processing all bundled together in one application. Developers working with monoliths typically need to deploy the entire application even if they only change one feature. In modern tech teams, the term is often used when discussing whether to break down a large system into microservices. While monoliths can be simpler to develop initially, they become harder to scale and maintain as they grow larger. Many companies are moving away from monoliths toward distributed architectures to improve flexibility and independent deployment.

Understanding what a monolith is in software development and how it differs from microservices architecture.

At a glanceCEFR B2
Commonness4/5
Versatility4/5
FormalityCasualFormalNeutral
Spoken ↔ WrittenSpokenWrittenBoth
Directness ↔ DiplomaticDirectDiplomaticDirect
RegionUS and UK
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Say it like this

✓We are still running a monolith
✓Breaking up the monolith
✓The monolith needs refactoring

Real examples

in a standup

"The payment feature is slow because the entire monolith has to be deployed every time we make a change."

in a code review

"This refactor will help reduce the coupling in our monolith and make it easier to extract services later."

in a team meeting

"We should start planning to migrate away from the monolith to independent microservices next quarter."

Don't say this

Handle with care. Do not use monolith as a verb. It is always a noun. Do not confuse monolith with monolithic architecture — monolith refers to the system itself, not the approach.

✕We need to monolith this service.
✓We need to keep this as part of the monolith.— Monolith is a noun describing an architecture, not a verb for an action you perform.
✕The monolithic code is a monolith.
✓The monolithic architecture is a monolith.— Monolith refers to the system structure, not the code quality. Use monolithic to describe the architecture type.
✕We are using a monolith approach.
✓We are running a monolith.— The correct phrasing is running or maintaining a monolith, not using a monolith approach.

Other forms

noun

monolith

"Our application is still a monolith."

adjective

monolithic

"The monolithic architecture makes scaling difficult."

Often used with

break up the monolithTo decompose a monolithic application into smaller services.
maintain the monolithTo keep a monolithic system running and updated.
large monolithA monolithic application that has grown significantly in size and complexity.
legacy monolithAn older monolithic system that the company wants to modernize.

Similar words

single-tiered applicationMore technical term emphasizing the unified structure.
traditional applicationBroader term that includes monoliths but is less specific.

Opposites

microservicesdistributed system

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Practice

Try it

4 quick exercises

Pick the most natural phrasing

1. Your team is discussing your application structure. What sounds most natural?

Complete the sentence

2. Deploying small changes is slow because we maintain a large _______.

Spot the mistake

3. Which sentence uses monolith incorrectly?

Rewrite naturally

4. Rewrite this using monolith: 'Our big, single application structure makes it hard to deploy changes quickly.'

Questions

Quick poll

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

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