Definitions from Wiktionary ( )

▸ noun:  The act of assembling a group or structure. [from 14th c.]
▸ noun:  Something possessing structure or form. [from 17th c.]
▸ noun:  The process during which something comes into being and gains its characteristics. [from 18th c.]
▸ noun:  (military) A grouping of military units or smaller formations under a command, such as a brigade, division, wing, etc. [from 18th c.]
▸ noun:  (geology) A layer of rock of common origin. [from 19th c.]
▸ noun:  (military) An arrangement of moving troops, ships, or aircraft, such as a wedge, line abreast, or echelon. Often "in formation".
▸ noun:  (sports) An arrangement of players designed to facilitate certain plays.
▸ noun:  The process of influencing or guiding a person to a deeper understanding of a particular vocation.
▸ noun:  (category theory) A structure made of two categories, two functors from the first to the second category, and a transformation from one of the functors to the other.

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