What does aggregation mean?
Aggregation refers to the process of bringing separate things together into one collective whole, as well as to the combined result of that process. The word applies broadly: statisticians speak of the aggregation of survey data, economists of aggregated national figures, biologists of the aggregation of cells or proteins into clusters, and software platforms of news or price aggregation from multiple sources. In computing and data science it has become a particularly important term, describing operations that summarize many individual records into totals, averages, or counts. Aggregation is a neutral, largely formal word with no inherent positive or negative connotation, though it often implies efficiency, scale, or systematic organization. Its opposite is dispersion or disaggregation — the breaking of a whole back into parts. Because so much modern life involves compiling scattered information into usable summaries, aggregation is a practical and frequently encountered term in both everyday technology and specialized fields.
nounThe action or process of collecting or combining separate items, individuals, or pieces of data into a single group, body, or total; also the resulting cluster or aggregate itself.
- The process of gathering or combining distinct elements — such as data, materials, or individuals — into a single collection or total.
- The mass, cluster, or combined total formed by such a process (e.g., an aggregation of data points).
- In biology and chemistry: the clustering of cells, particles, or molecules into a larger mass.
"The aggregation of survey responses from all fifty states gave researchers a reliable national picture."
"The platform's value comes from its aggregation of prices across hundreds of retailers."
"Under the microscope, the proteins were seen to form dense aggregations within the cell."
The plural is used mainly in scientific contexts when referring to multiple distinct clusters or masses, such as protein aggregations in cell samples.
"Several abnormal protein aggregations were observed in the tissue samples."
Every time your news app bundles headlines from dozens of sources into one feed, you're watching 'aggregation' at work — a word that's been quietly doing this job since the 1500s.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of aggregation
Aggregation derives from the Latin verb aggregare, meaning 'to add to' or 'to attach to a flock or group', formed from ad- ('to') plus grex, gregis ('flock, herd'). The noun entered English in the mid-sixteenth century, borrowed either directly from Latin or through late Latin forms. It shares this pastoral root with a family of English words including aggregate, congregation, gregarious, and segregate — all ultimately tracing back to the image of a flock. The word's meaning has remained remarkably stable: joining discrete units into a collective mass.
Word family
Usage notes
Aggregation is a formal-to-neutral term common in technical, scientific, statistical, and business writing. It is especially prevalent in data science and computing, where it refers to summarizing many records into totals, averages, or other combined figures. It carries no strong emotional connotation and is generally preferred over looser words like 'bunch' when precision is needed.
Don't confuse with
Aggravation means the act of making something worse or more annoying, whereas aggregation means gathering things together into a whole.
A congregation specifically refers to a gathered assembly of people, especially for worship, while aggregation is a general term for combining any items, data, or entities.