Overlays & Surfaces · Containers
Accordion
also known as accordion menu
An accordion is a vertically stacked set of headers, each of which expands to reveal its content and collapses to hide it, letting users scan many topics without scrolling far. Classic accordions allow only one panel open at a time, though many implementations allow several. It's built from multiple collapsible sections grouped together.
See it live — shadcn/ui · MUI · Ant Design
Don't confuse it with
An accordion is a group of several collapsible sections managed together, often with only one open at a time. A single show/hide toggle for one section is a disclosure (or expander/collapsible). So an accordion is essentially many disclosures stacked and coordinated.
In the wild
The FAQ section on many sites where clicking a question reveals its answer is an accordion.