CORS
n.n. Stands for Cross-Origin Resource Sharing. A security rule for web browsers that controls how a website can ask for data from a different website.
n. Abbreviation for Cross-Origin Resource Sharing. A browser-based security mechanism that uses HTTP headers to define which origins are permitted to access resources on a server, preventing unauthorized cross-domain requests.
The developer fixed the CORS error on the website.
When the frontend tried to fetch data from a different API domain, the browser blocked the request because the server had not configured CORS headers.
Implementing a robust CORS policy is essential for modern web applications that rely on third-party microservices, as it ensures that only trusted domains can interact with sensitive backend endpoints.
An initialism for Cross-Origin Resource Sharing. The term is a compound of the prefix cross-, the noun origin, and the phrase resource sharing, following the naming conventions of established web security protocols.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Commonly used in the context of web development and network security; often appears in the phrase 'CORS error' or 'CORS policy'.
Last updated July 22, 2026