A collection of things is a group of similar things that you have deliberately acquired, usually over a period of time.

A collection of stories, poems, or articles is a number of them published in one book.

A collection of things is a group of things.

A fashion designer's new collection consists of the new clothes they have designed for the next season.

Collection is the act of collecting something from a place or from people.

If you organize a collection for charity, you collect money from people to give to charity.

A collection is money that is given by people in church during some Christian services.