noun
plural -tions
the act or process of getting things from different places and bringing them together [noncount]
[count] :a group of interesting or beautiful objects brought together in order to show or study them or as a hobby
[count] :a request for money in order to help people or to pay for something important
[count] :a group of clothes that a fashion designer has created
[count] :a group of different writings that are brought together in one book