# backpressure

Source: https://englishreference.com/word/backpressure
Updated: 2026-08-27

## Senses

### 1. fluid dynamics

noun · CEFR C1 · Technical

pressure that pushes against the direction that a liquid or gas is supposed to flow.

For teachers: pressure exerted in a direction opposite to the main flow of a fluid in a conduit, often caused by friction or obstructions.

- The plumber explained that the clog was creating backpressure in the pipes.
- Engineers must carefully calculate the backpressure in the exhaust system to ensure the engine operates at peak efficiency without overheating.

Usage: Often used as an uncountable noun when referring to the physical force.

### 2. computing and systems design

noun · CEFR C1 · Technical

a way to tell a data sender to slow down because the receiver is too busy to handle more.

For teachers: a resistance or feedback mechanism in a system that limits the flow of data from a producer when the consumer is overwhelmed.

- The server used backpressure to stop the app from sending too many requests at once.
- Implementing effective backpressure strategies is crucial in reactive programming to prevent memory exhaustion when the data producer outpaces the consumer.

Usage: Commonly used in the context of stream processing and distributed systems.

## Examples

- The clogged pipe created too much backpressure for the pump.
- When the database became overloaded, the system applied backpressure to the web server to prevent a total crash.
- Engineers must carefully calibrate the exhaust system to minimize backpressure, as excessive resistance can significantly reduce the engine's overall power output and fuel efficiency.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.