1. a group of objects gathered and kept together
2. the act of gathering or bringing things together
3. money gathered from people for a particular purpose

Examples

• She has an impressive collection of vintage books.
• The museum’s art collection attracts visitors from around the world.
• The collection of data took several months to complete.
• They organized a collection for the local food bank.
• The garbage collection happens every Tuesday morning.
• His coin collection is worth thousands of dollars.
• The collection of evidence was crucial to solving the case.