The line between UX, IxD, and UI often gets blurry, but in short:
UX stands for User Experience. It's all about research, data collection, and strategy: user personas, feature prioritization, information architecture, user journeys, and problem framing.
IxD stands for Interaction Design. It's the discipline that takes all UX insights and translates them into wireframes and fully interactive prototypes—keeping a sharp focus on accessibility, ease of interaction, user engagement, and front-end feasibility.
UI stands for User Interface. It's the discipline that builds the actual visual surface. UI designers translate UX and IxD blueprints into beautiful, pixel-perfect components, design systems, and reusable element libraries.
If you want to dive deeper into Interaction Design, check out the Interaction Design Foundation → UX Design Courses & Global UX Community.