What does UI stand for? In tech, UI stands for user interface, the part of a device, app or website that a person sees and touches. Buttons, menus, icons, text boxes, sliders and the layout that holds them together all belong to the UI. When someone says an app has a clean UI, they mean it is easy to see where to tap and what will happen.
Step away from software, though, and UI picks up a couple of very different jobs. On a state benefits page, UI means unemployment insurance, and on a medical chart it can mean urinary incontinence. Those are covered further down.
Quick facts
Stands for
User interfaceOther meanings
Unemployment insurance, urinary incontinenceType
Initialism, said U IUsed in
Apps, websites, car dashboards, appliances, game menusRelated terms
UX (user experience), GUI, CLIJob titles
UI designer, UI developer, UI/UX designer
UI stands for user interface: the two words
| Letter | Word | Meaning |
|---|---|---|
| U | User | The person using the product |
| I | Interface | The meeting point where person and machine exchange input and output |
An interface is any surface where two things meet and pass information. A user interface is where you meet the machine. You give input by tapping, typing, speaking or turning a dial, and the machine answers with text, sound, light or motion. A thermostat's dial, a microwave's keypad and a phone's lock screen are all user interfaces.
Parts of a user interface
- Layout: where things sit on the screen and how much space they get.
- Controls: buttons, checkboxes, toggles, sliders and drop down menus.
- Navigation: tabs, menus and back buttons that move you between screens.
- Typography and color: fonts, sizes and colors that set what you read first.
- Feedback: loading spinners, error messages and the small shake when a password is wrong.
In a team meeting: "Users can't find the save button, so let's fix the UI before launch." The speaker means the screen design itself needs work: the button should be bigger, clearer or moved to a better spot.
UI vs UX
These two often appear together, as in "UI/UX designer," but they are not the same. UI is the look and controls on screen. UX, user experience, is the whole journey a person has with a product, including how easy, fast and satisfying it feels.
| UI | UX | |
|---|---|---|
| Stands for | User interface | User experience |
| Focus | Screens, buttons, colors, type | The full path from first visit to finished task |
| Question it asks | Is this screen clear and attractive? | Does this product solve the problem well? |
| Typical work | Mockups, style guides, icon sets | User research, testing, flow maps |
A food ordering app could have a beautiful UI and still give a poor UX if checkout takes ten steps. Good products need both.
What does UI stand for on benefit forms and medical charts?
| Field | Stands for | Example |
|---|---|---|
| Government benefits | Unemployment insurance | "File your weekly UI claim online." |
| Medicine | Urinary incontinence | A chart note about bladder control |
| Payroll | UI tax, the employer's unemployment insurance tax | A line on an employer's tax report |
| Colleges | Short name for some universities | Used by schools whose names begin with University of I |
Unemployment insurance pays partial wages for a time to workers who lose a job through no fault of their own. Each state runs its own program within federal rules, so eligibility, weekly amounts and how long payments last differ from state to state.
How to say and write UI
Say the two letters: "U I," which sounds like "you eye." Both letters are capitals, and dots between them look dated. That opening "you" sound starts with a y glide, so the article is "a UI," as in "a simple UI." The plural is UIs.
Questions people ask
What does UI mean in an app?
In an app, UI means user interface: the screens, buttons, menus and text you use to make the app do things.
What is the difference between UI and UX?
UI is the visual layer and controls on screen. UX is the overall experience of using the product, including how easy and pleasant it is to finish a task.
What does UI stand for in unemployment?
In unemployment, UI stands for unemployment insurance. It is the state run program that pays temporary benefits to eligible workers who lose their jobs.
What does a UI designer do?
A UI designer plans how screens look and behave: layouts, colors, fonts, icons and controls. They often hand detailed mockups to developers who build them.
Is it a UI or an UI?
Write a UI. The letter U is pronounced like you, which begins with a consonant sound.