Design Dictionary

A plain-language guide to UX and design terminology

All terms

Intermediate

A/B Testing

A method of comparing two versions of a design by showing each to a different group of users and measuring which performs better.

Research & Discovery
Foundational

Accessibility

The practice of designing products and experiences that can be used by people of all abilities.

Accessibility
Foundational

Affordance

A property of an object or interface that suggests how it should be used.

Interaction Design Psychology & Behaviour
Intermediate

Atomic Design

A methodology for creating design systems by breaking interfaces into five hierarchical levels: atoms, molecules, organisms, templates, and pages.

Design Ops & Process
Foundational

Breadcrumbs

A secondary navigation pattern that shows users their current location within a site's hierarchy.

Information Architecture
Intermediate

Card Sorting

A research method where participants organise content into groups to reveal how they naturally categorise information.

Research & Discovery Information Architecture
Intermediate

Cognitive Load

The total amount of mental effort required to use an interface or process information.

Psychology & Behaviour Accessibility
Foundational

Colour Theory

The study of how colours interact, combine, and influence perception and emotion in design.

Visual Design
Foundational

Content Strategy

The planning, creation, delivery, and governance of useful, usable content that serves both user needs and business goals.

Content & Communication
Intermediate

Dark Pattern

A deceptive design choice that tricks users into actions they didn't intend, benefiting the business at the user's expense.

Psychology & Behaviour
Intermediate

Design System

A collection of reusable components, guidelines, and standards that ensure consistency across products.

Design Ops & Process
Foundational

Design Thinking

A human-centred problem-solving methodology that emphasises empathy, ideation, and iterative prototyping.

Design Ops & Process
Intermediate

Design Token

A named, platform-agnostic variable that stores a single design decision — like a colour, spacing value, or font size.

Design Ops & Process
Foundational

Empathy Map

A collaborative visualisation tool that captures what users say, think, feel, and do to build shared understanding of their experience.

Research & Discovery Psychology & Behaviour
Intermediate

Fitts's Law

A predictive model stating that the time to reach a target is a function of the target's size and distance from the starting point.

Psychology & Behaviour
Foundational

Gestalt Principles

A set of perceptual laws describing how humans naturally group and interpret visual elements.

Visual Design Psychology & Behaviour
Intermediate

Heuristic Evaluation

A usability inspection method where evaluators judge an interface against established design principles.

Research & Discovery
Foundational

Hierarchy

The arrangement of elements to signal their relative importance and guide the viewer's attention.

Visual Design Information Architecture
Foundational

Information Architecture

The structural design of information spaces — how content is organised, labelled, and connected.

Information Architecture
Foundational

Iteration

The practice of repeatedly refining a design through cycles of building, testing, and learning.

Design Ops & Process
Foundational

Mental Model

A user's internal understanding of how a system or process works.

Psychology & Behaviour
Intermediate

Microcopy

The small pieces of text in an interface — button labels, error messages, tooltips, placeholders — that guide users through actions.

Content & Communication Interaction Design
Intermediate

Microinteraction

A small, contained moment of interaction — like a toggle, a swipe, or a loading animation — that serves a single task.

Interaction Design
Foundational

Mood Board

A curated visual collage of imagery, colours, textures, and typography that captures the intended look and feel of a design direction.

Visual Design Design Ops & Process
Foundational

Personas

Fictional but research-based character profiles that represent key segments of your target audience.

Research & Discovery
Intermediate

Progressive Disclosure

A design pattern that reveals information and options gradually, showing only what's needed at each step.

Interaction Design Psychology & Behaviour
Foundational

Prototype

A preliminary model of a product or feature used to test concepts and interactions before full development.

Design Ops & Process Interaction Design
Intermediate

Responsive Design

An approach to design that ensures interfaces adapt fluidly to different screen sizes and devices.

Visual Design Accessibility
Foundational

Signifier

A perceivable cue that communicates what action is possible and how to perform it.

Interaction Design Visual Design
Foundational

Typography

The art and technique of arranging type to make written language legible, readable, and visually appealing.

Visual Design Content & Communication
Foundational

Usability Testing

A research method where real users attempt tasks on a product to reveal usability issues.

Research & Discovery
Foundational

User Experience (UX)

The overall experience a person has when interacting with a product, system, or service — encompassing every touchpoint and emotion.

Research & Discovery Design Ops & Process
Foundational

User Flow

The path a user takes through an interface to complete a specific task or goal.

Interaction Design Information Architecture
Foundational

White Space

The empty or unmarked areas between and around design elements that give content room to breathe.

Visual Design
Foundational

Wireframe

A low-fidelity visual representation of a page layout that shows structure and content placement without detailed design.

Interaction Design Design Ops & Process