formation

Formation is defined as an arrangement, the way something is arranged or a coming together.

(noun)

An example of a formation is group of soldiers marching as a group.
An example of a formation is a set of rocks that has lasted through the centuries.

See formation in Webster's New World College Dictionary

noun

a forming or being formed
a thing formed
the way in which something is formed or arranged; structure
an arrangement or positioning, as of troops, ships, airplanes in flight, football players, etc.
Ecol. the major unit of vegetation usually extending over a large area, as the prairie, deciduous forest, tundra, etc.
Geol. a rock unit distinguished from adjacent deposits by some common character, as composition, origin, type of fossil, etc.

Origin: ME formacioun < OFr formation < L formatio < pp. of formare: see form

See formation in American Heritage Dictionary 4

noun

The act or process of forming something or of taking form.
Something formed: beautiful cloud formations.
The manner or style in which something is formed; structure: the distinctive formation of the human eye.
A specified arrangement or deployment, as of troops.
Geology The primary unit of lithostratigraphy, consisting of a succession of strata useful for mapping or description.

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