網域 (wǎng yù) literally means 'network domain' — 網 (wǎng) means 'net' or 'web', and 域 (yù) means 'region', 'realm', or 'domain'. Together, they refer specifically to an internet domain: the unique name that identifies a website or server on the internet, such as 'example.com' or 'zh.wikipedia.org'. It is a technical term widely used in IT, web development, and digital administration contexts in Chinese-speaking regions.

This term is functionally equivalent to the English word 'domain' in computing — not to be confused with general meanings of 'domain' like 'field of expertise' (which is 領域 lǐngyù). In everyday usage, 網域 appears in discussions about domain registration, DNS settings, website hosting, and cybersecurity. While technically precise, it’s also common in non-technical news or business reports when referring to online presence or digital infrastructure.