container

noun

• Someone who contains; something that contains.
• An item in which objects, materials or data can be stored or transported.
• A very large, typically metal, box used for transporting goods.
• (by extension) Someone who holds people in their seats or in a (reasonably) calm state.
• A file format that can hold various types of data.
• An abstract data type whose instances are collections of other objects.
• Any user interface component that can hold further (child) components.