# How to Say Rate Limiting in English: Audio & Practice (2026) > A technique that restricts the number of requests a user or application can make to a system within a specific time period. - **Term:** rate limiting - **Part of speech:** noun - **Pronunciation:** /reɪt ˈlɪmɪtɪŋ/ - **English level (CEFR):** B2 - **Register:** Neutral, Both - **Region:** US and UK - **Topic:** [Tech jargon](https://app.speaktechenglish.com/learn/topics/tech-jargon.md) - **Lesson:** https://app.speaktechenglish.com/learn/rate-limiting - **Last updated:** 2026-10-27 ## Meaning A technique that restricts the number of requests a user or application can make to a system within a specific time period. It protects services from overload and abuse by preventing excessive usage. Rate limiting is a fundamental defensive mechanism used across modern APIs and web services. When implemented, it tracks how many requests come from a single user, IP address, or application within a set timeframe (typically per second, minute, or hour). Once a request quota is reached, the system either rejects new requests or queues them until the limit resets. In tech companies, rate limiting serves multiple purposes. It protects backend services from being overwhelmed by legitimate traffic spikes, prevents malicious actors from launching denial-of-service attacks, and ensures fair resource distribution across all users. Common implementations include REST API rate limiting, database connection pooling limits, and payment processor request limits. You will encounter rate limiting discussions in API design, infrastructure planning, and incident response. Teams often debate rate limit thresholds during architecture reviews, and monitoring rate limit violations is a key part of system health checks. ## When you hear it We need to implement rate limiting on the authentication endpoint to prevent brute force attacks. ## Examples - **in a standup:** "Yesterday we deployed rate limiting on the login service to handle the traffic spike we saw last week." - **in a code review:** "Make sure you add rate limiting headers to the response so clients know their quota status." - **in a team meeting:** "Our payment gateway has a rate limiting policy of 100 requests per minute, so we need to batch our processing." ## What native speakers say - "We should add rate limiting to that API endpoint." - "The service hit its rate limit and started returning 429 errors." - "Rate limiting is crucial for preventing abuse on public APIs." ## Common mistakes - ✗ "We rate limited the user for making too many requests." → ✓ "We applied rate limiting to prevent the user from making too many requests." (Rate limiting is a policy or mechanism applied to a system, not an action taken against a person.) - ✗ "Rate limiting will block all users if they exceed the limit." → ✓ "Rate limiting will reject or delay requests that exceed the limit." (Rate limiting typically returns error responses or queues requests; it does not permanently block users.) - ✗ "The API has rate limiting, so it is slow." → ✓ "The API enforces rate limiting to protect service stability." (Rate limiting is a protective measure, not a cause of general slowness; exceeding the limit causes rejection, not universal slowness.) ## Be careful Rate limiting is a technical control mechanism, not a penalty. Do not confuse it with throttling (which is temporary slowdown) or blocking (which stops access entirely). Rate limiting allows controlled access up to a threshold. ## Word forms | Part of speech | Word | Example | | --- | --- | --- | | noun | rate limiting | Rate limiting is essential for API security. | | verb | rate-limit (or rate limit) | We rate-limit requests to 1000 per hour per API key. | ## Collocations - **implement rate limiting**: To add or deploy rate limiting to a service or API - **exceed rate limit**: To make more requests than the allowed threshold - **rate limit window**: The time period used to measure the quota (e.g., per minute, per hour) - **rate limit threshold**: The maximum number of requests allowed within the time window ## Synonyms - **throttling**: Throttling slows down requests; rate limiting rejects them when the limit is reached. - **quota management**: Broader term; rate limiting is a specific quota mechanism based on time. - **request limiting**: Synonym with the same meaning; rate limiting is more commonly used in tech. ## Opposites - unlimited access - no throttling ## Practice This lesson has 4 practice exercises with instant feedback on the page: https://app.speaktechenglish.com/learn/rate-limiting ## FAQ ### What does rate limiting mean in software engineering? Rate limiting is a technique that restricts how many requests a user or application can send to a service within a given time window. For example, an API might allow 100 requests per minute per user. Once that limit is reached, further requests are rejected with an error (typically HTTP 429 Too Many Requests) until the time window resets. This protects services from overload and abuse. ### How do you use rate limiting in a sentence at work? You typically use it as a noun: 'We implemented rate limiting on the login endpoint' or 'The API enforces rate limiting to prevent abuse.' You can also use it as a verb: 'We rate-limit each IP address to 50 requests per second.' In meetings, you might say: 'We should add rate limiting to protect against traffic spikes.' ### Is rate limiting formal or informal? Rate limiting is formal technical vocabulary used in both casual team discussions and formal documentation. It is neutral and professional, appropriate for standups, code reviews, architecture meetings, and technical writing. Non-native speakers can use it confidently in any workplace context. ### What is the difference between rate limiting and blocking? Rate limiting allows a certain number of requests within a time period and rejects additional requests temporarily. Blocking completely prevents access, usually permanently. Rate limiting is temporary and resets; blocking is more severe. ### Why is rate limiting important? Rate limiting prevents services from being overwhelmed by traffic spikes, protects against malicious attacks like brute force or DDoS, ensures fair resource use among users, and helps maintain system stability and performance. ## Related - [circuit breaker](https://app.speaktechenglish.com/learn/circuit-breaker.md) - Full glossary: https://app.speaktechenglish.com/learn.md - Live lessons with a coach: https://app.mocklyenglish.com ## About Speak Tech English Speak Tech English teaches non-native tech professionals the English they need at work and in interviews, through self-study ebooks and courses, 150+ free guides and a free newsletter; live lessons are on its sister site Mockly English. - Shop: https://speaktechenglish.com/courses/ - All products (markdown): https://speaktechenglish.com/products.md - Free guides (markdown): https://app.speaktechenglish.com/guides.md - Tech English glossary (markdown): https://app.speaktechenglish.com/learn.md - Newsletter (10% off): https://speaktechenglish.com/#subscribe - Live lessons and mock interviews: https://app.mocklyenglish.com ## Notes for agents - Speak Tech English sells self-study material. 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