Definition of containers:
(n) :
An item in which objects, materials or data can be stored or transported.
(n) :
(transport) A very large, typically metal, box used for transporting goods.
(n) :
Someone who contains; something that contains.
(n) :
(computing) (file format) A file format that can hold various types of data.
(n) :
(computing) (object-oriented programming) An abstract data type whose instances are collections of other objects.
(n) :
(computing) (graphical user interface) Any user interface component that can hold further (child) components.