formation

formation /for·ma·tion/ (for-ma´shun)

1. the process of giving shape or form; the creation of an entity, or of a structure of definite shape.

2. a structure of definite shape.

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reaction formation  a defense mechanism in which a person adopts conscious attitudes, interests, or feelings that are the opposites of their unconscious feelings, impulses, or wishes.

reticular formation  any of several diffuse networks of cells and fibers in the spinal cord and brainstem; subdivided into the reticular formations of the spinal cord, medulla oblongata, mesencephalon, and pons.

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for·ma·tion (fôr-mshn)

n.

1. The act or process of forming something or of taking form.

2. Something formed.

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formation

1. the process of giving shape or form; the creation of an entity, or of a structure of definite shape.

2. a structure of definite shape.