Overlays & Surfaces
Modal Bottom Sheet
also known as modal sheet
A modal bottom sheet slides up over the content with a scrim dimming everything behind it, so the user must interact with or close it before returning to the app. It sits at a higher elevation than the page and is an alternative to menus or simple dialogs on mobile, offering room for icons and longer text.
Don't confuse it with
A modal bottom sheet blocks the background with a scrim; a standard (persistent) bottom sheet does not and coexists with the main content. It's like a modal dialog but anchored to the bottom edge. An action sheet is iOS's modal-bottom-sheet-style list of choices.
In the wild
Tapping Share in Google Maps opens a modal bottom sheet with a dimmed map behind it.