# Response Meaning in Tech: API Responses Explained Simply > The data or message that a server sends back to a client after receiving a request. - **Term:** response - **Part of speech:** noun - **Pronunciation:** /rɪˈspɒns/ - **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/response - **Last updated:** 2026-10-27 ## Meaning The data or message that a server sends back to a client after receiving a request. In tech, it refers to what a system returns when you ask it to do something. In software engineering, a response is the output your system produces in reaction to an input or request. When you make an API call, send a network request, or interact with a server, the response is what comes back. This could be JSON data, HTML code, an error message, or a status code. Understanding responses is critical because you must handle different response types, check response codes (like 200 for success or 404 for not found), and parse response data correctly. In your daily work, you will hear about HTTP responses, API responses, database responses, and webhook responses. The term is used both when discussing architecture and in code reviews when debugging what a system is returning. ## When you hear it We need to check the response code before processing the data. ## Examples - **in a standup:** "We fixed the bug where the API response was not being parsed correctly." - **in a code review:** "Make sure you validate the response structure before accessing the data fields." - **in a team meeting:** "The database response time has improved since we added the cache layer." - **in a Slack message:** "Did you get a response from the third-party service yet?" ## What native speakers say - "The API response came back with a 200 status code" - "We need to handle the response asynchronously" - "The server response took too long" - "Check the response headers for errors" ## Common mistakes - ✗ "The server response us with the data." → ✓ "The server sent us a response with the data." (Response is a noun, not a verb. You cannot response something.) - ✗ "We got a good response from the API." → ✓ "We got a successful response from the API (or a 200 response)." (Response refers to the data returned, not whether it is good or bad. Be specific about status codes.) - ✗ "The response of the request is missing." → ✓ "The response to the request is missing." (Use the preposition to, not of, when talking about response to a request.) ## Be careful Often confused with reply or answer. Response is more technical and refers to data returned by a system, while reply/answer refer to human communication. ## Word forms | Part of speech | Word | Example | | --- | --- | --- | | noun | response | The API response included user data. | | noun | responses | We logged all the responses from the server. | | adjective | response (in compounds) | The response time was 200 milliseconds. | ## Collocations - **HTTP response**: A response from a web server using the HTTP protocol - **API response**: Data returned by an application programming interface - **response code/status**: The number (like 200, 404, 500) indicating the result of a request - **response time**: How long it takes for a system to return a response - **response body**: The actual data content of a response - **response headers**: Metadata about the response ## Synonyms - **output**: More general term for what a system produces; response is more specific to requests - **reply**: Often used for human communication; response is broader and more technical - **result**: General outcome; response refers specifically to what is returned to a request ## Opposites - request ## Practice This lesson has 4 practice exercises with instant feedback on the page: https://app.speaktechenglish.com/learn/response ## FAQ ### What does response mean in software engineering? In software engineering, a response is the data or message that a server or system returns after processing a request. It includes the actual data (response body), status information (response code), and metadata (response headers). For example, when you call an API, the response tells you whether the request succeeded and contains the information you asked for. ### How is a response different from a request? A request is what the client (you) sends to the server asking it to do something. A response is what the server sends back. Think of it like email: you send a request (email), and you receive a response (reply). Requests go out; responses come back. ### What are common HTTP response codes and what do they mean? Common HTTP response codes include: 200 (OK - request succeeded), 201 (Created - resource was created), 400 (Bad Request - request was malformed), 401 (Unauthorized - authentication required), 404 (Not Found - resource does not exist), and 500 (Internal Server Error - server error). These codes tell you immediately whether your request worked. ### Is response formal or informal? Response is neutral and formal enough for professional technical settings. It is the standard term used in documentation, code, and engineering discussions. You can use it in any tech context without sounding casual or too formal. ## Related - [request](https://app.speaktechenglish.com/learn/request.md) - [API](https://app.speaktechenglish.com/learn/api.md) - [payload](https://app.speaktechenglish.com/learn/payload.md) - [latency](https://app.speaktechenglish.com/learn/latency.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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