asynchronous
adj.adj. describing a process where different parts of a system do not have to happen at the same time. You use this when one task can start before another one finishes.
adj. relating to a process or system where events occur independently of a shared clock signal or sequence. In computing, it describes operations that do not block the execution of other tasks.
The website uses asynchronous loading to make the page faster.
Modern web applications often use asynchronous communication to allow the user to continue interacting with the interface while data is being fetched from the server.
By implementing asynchronous processing, the server can handle thousands of concurrent requests without freezing the user interface, significantly improving the overall responsiveness of the application.
From a- + synchronous.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Last updated May 19, 2026