a class that can contain a number of items in a certain data structure such as linked lists and hash tables

a class used to reference many instances of another class

a container which holds a number of items in a data structure and provides various operations to manipulate the contents of the collection, such as insert item, remove item, find item, etc

A category of information that Oracle Expert collects and analyzes. The collection classes are Database, Instance, Schema, Environment, and Workload.

In object-oriented programming, a collection class is any class that is capable of storing other objects. Collection classes usually implement some kind of data structure, such as a list, map, set, array, or tree. A collection class is usually able to store an arbitrary number of data items, i.e. the size of the collection is adjusted automatically.