What does agglomeration mean?
An agglomeration is a clustered mass of things that have been gathered together without any particular order — a jumble of objects, ideas, or materials heaped into one place. The word is most familiar in two settings. In everyday language it describes untidy accumulations: an agglomeration of papers, souvenirs, or odds and ends, usually with a hint of disorder. In geography and economics it has a precise technical meaning: an urban agglomeration is a continuous built-up area formed when a city and its surrounding towns grow together, as with the vast agglomerations around Tokyo or Delhi. Relatedly, 'agglomeration economies' refers to the productivity gains that arise when businesses and workers concentrate in one location, sharing infrastructure, labor pools, and ideas. Derived from Latin roots meaning 'to ball up' or 'wind into a ball', the word entered English in the seventeenth century. It remains a formal but versatile term wherever clustering — whether messy or economically powerful — is the point.
A jumbled mass or collection of heterogeneous things gathered together.
"The drawer contained an agglomeration of batteries, rubber bands, and dead pens."
Often implies lack of organization; slightly formal.
In geography and economics, a contiguous urban region formed by the merging of a city with its suburbs and satellite towns, or the spatial concentration of firms and workers that generates productivity benefits.
"Planners studied the agglomeration effects of concentrating tech firms in one district."
Regular plural; commonly used for multiple urban agglomerations in demographic and economic writing.
"The report compared the growth rates of major agglomerations across Asia."
Economists have a whole field — agglomeration economics — devoted to why cities make us more productive just by cramming us together.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of agglomeration
Agglomeration derives from the Latin verb agglomerare, meaning 'to wind onto a ball' or 'to gather into a mass', formed from ad- ('toward') plus glomus ('ball of yarn'). The noun passed into English via French in the early seventeenth century, initially describing physical masses such as mineral agglomerates. Its modern economic and geographic senses developed in the nineteenth and twentieth centuries as scholars studied industrial clustering and metropolitan growth. It shares its root with conglomerate and related words built on the same Latin base.
Related word forms
How agglomeration is actually used
Formal to neutral register; common in academic writing on geography, economics, and sociology. In everyday use it often carries a slightly negative connotation of disorder or clutter.
Easily confused with agglomeration
A conglomeration is a mixture of diverse elements, often implying a loosely organized blend, while an agglomeration emphasizes physical clustering or accumulation into one mass; 'conglomerate' also names a corporation of merged companies.