user interface

noun

1. The part of a computer program, website, or device that a person uses to control it and communicate with it.

   B1

   countable

   • "The app has a simple user interface."A2
   • "The user interface allows you to control the device easily."B2

2. The design and arrangement of the controls, menus, buttons, and other elements through which users interact with a system.

   B2

   countable

   • "The designers redesigned the user interface to improve accessibility."B2
   • "A well-designed user interface should make complex tasks feel intuitive."C1