- Gather together or accumulate (a large amount of something).
- To collect a large quantity of something over time.
Early 16th century (in the sense "collect in a heap"): from a- (expressing completeness) + mass "a heap".
- He amassed a large fortune through his business.
- She amassed a vast collection of art.
- He amassed a great deal of knowledge on the subject.
- She amassed a huge amount of data for her research.
- He amassed a significant amount of wealth over the years.