Terminal (zhōng duān) is a technical noun borrowed from English, widely used in computing, telecommunications, and electronics. Literally, 终 means 'end' or 'final', and 端 means 'end', 'tip', or 'point' — together they evoke the idea of a 'final endpoint' in a system: where data enters or exits, or where a user interacts with a network or device. It commonly refers to physical hardware (e.g., an ATM, kiosk, or POS machine) or logical interfaces (e.g., a command-line terminal on a computer).

This word appears frequently in IT contexts, public infrastructure (like subway ticketing terminals), and smart-device ecosystems. Unlike colloquial terms like 电脑 (diànnǎo, 'computer'), 终端 emphasizes functional role rather than form — a smartphone, tablet, or even a smartwatch can be called a 终端 when acting as an access point to a service. It’s neutral in register and common in both formal documentation and everyday tech talk.