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formation

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noun American English pronunciation: formation /fɔrˈmeɪʃ(ə)n/ 
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Related dictionary definitions

  1. 1
    [uncountable] the process during which something develops or is created

    the formation of stones in the kidneys

    factors that affect the formation of children's personalities

  2. 2
    [countable/uncountable] the way in which a moving group of people or things is organized into a particular shape or pattern

    Their unusual defensive formation won the game.

    The soldiers broke into a run, keeping formation.

    in formation (=in a fixed pattern):

    airplanes flying in formation

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