Definition of formation

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for·ma·tion

(fôr-m

n) KEY

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.

OTHER FORMS:
for·mation·al(Adjective)

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