collection
US /kəˈlek.ʃən/
UK /kəˈlek.ʃən/

1.
a group of objects or works of art, especially when they are collected, displayed, or sold together
:
•
She has an impressive collection of antique dolls.
•
The museum houses a vast collection of Roman artifacts.
2.
the act or process of gathering things together
:
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The collection of data is crucial for our research.
•
The charity organized a food collection for the needy.