User Interface (UI) Glossary Definition

A user interface is the part of a system that people use to view information, enter data, make choices, and complete tasks.

User Interface (UI) is a Web accessibility concept used to make digital content and interfaces usable by people with different abilities, devices, and assistive technologies.

Technical writers document user interfaces in procedures, field descriptions, embedded help, screenshots, and release notes. UI terminology must stay aligned with the actual product so users can follow instructions accurately.

Designers, developers, content authors, testers, and compliance teams use this concept when making Web experiences perceivable, operable, understandable, and robust.

Related concepts include Accessible Rich Internet Applications, Alternative Text and Screen Reader.

Additional Resource: MDN Web Docs Glossary.