What is Collection ?
Collection is (noun) 1. a group of things that have been brought together He allowed me to see his stamp collection. The museum has a large collection of Italian paintings. 2. money which has been gathered We’re making a collection for Oxfam. 3. the action of bringing things together 4. the fetching of goods Your order is in the warehouse awaiting collection. 5. the taking of letters from a postbox or post office for dispatch There are four collections a day from the postbox at the corner of the street. The last collection is at 6 p.m.
source: Easier English, Student Dictionary Upper Intermediate Level