/fɔːrˈmeɪʃən/
[noun] The process of making or developing something, or the way in which something is arranged or organized. It can describe the creation of a group, structure, or shape.
Every time you say 'formation,' you are unknowingly borrowing a word the Romans used to describe a blacksmith shaping molten metal.
The word 'formation' traces its roots to the Latin verb *formare*, meaning 'to shape, to form, to mould.' This verb was itself built from the Latin noun *forma*, which described a shape, mould, or pattern — sometimes even the physical die or template a craftsman would use to stamp a consistent form onto raw material. The Romans used *forma* very concretely: it was the mould into which heated metal or clay was pressed, giving it its final shape. From this practical, workshop origin, the concept slowly expanded to cover any kind of shaping, whether of objects, ideas, or people.
From *formare*, Latin speakers derived the noun *formatio* (in its genitive form, *formationis*), meaning the act or process of shaping something. This is the direct ancestor of our modern English word. Latin *formatio* passed into Old French as *formation*, keeping much the same meaning and form, which made its journey into English relatively smooth. English borrowed the word in the 15th century, during a period when scholars and writers were enthusiastically importing Latin and French vocabulary to enrich the language.
The chain of transmission is clear: Latin *formare* → Latin *formatio* → Old French *formation* → Middle English *formation*. When the word arrived in English, it carried its original sense of 'the action of forming something.' Early English uses tended to be fairly abstract — writers spoke of the formation of ideas, of character, or of institutions. The word described a process as much as a result.
Over the following centuries, 'formation' developed a remarkable range of meanings without ever losing its central idea of 'shaping.' Geologists adopted it to describe layers of rock that had been shaped by natural forces over millions of years — a 'rock formation' being a distinct arrangement of stone with a recognisable structure. Military writers used it to describe soldiers arranged in a deliberate pattern, such as a battle formation. Aviation brought the word into everyday language, with pilots flying 'in formation' — moving together as a coordinated, shaped unit.
What is surprising about 'formation' is how the same word comfortably spans the geological timescale and the dance floor. When Beyoncé released her song 'Formation' in 2016, she was — consciously or not — using a word that connects ancient Roman metalworking to military strategy to the precise choreography of a music video. The root idea of deliberate, purposeful shaping runs through every single use. Whether rock strata, football tactics, or a new company, something has been pressed into a meaningful shape — and that is exactly what the Romans meant by *formatio*.