aggregation

noun7

1. •
   The act of collecting together, of aggregating.
2. •
   The state of being collected into a mass, assemblage, or (aggregated) sum.
3. •
   A collection of particulars; an aggregate.
4. •
   Summarizing multiple routes into one route.
5. •
   A component of natural language generation that entails combining syntactic elements.
6. •
   Kind of object composition which does not imply ownership.

   • The difference between an association and an aggregation is entirely conceptual and is focused strictly on semantics. — 2002
7. •
   The majority of the parasite population concentrated into a minority of the host population.