Webster dictionary was developed by Noah Webster in the beginning of 19th century. On this website, you can find definition for formation from the 1913 edition of Webster's Revised Unabridged Dictionary. Define formation using one of the most comprehensive free online dictionaries on the web.

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Part of Speech: noun
Results: 6
2. The manner in which a thing is formed; structure; construction; conformation; form; as, the peculiar formation of the heart.
3. A substance formed or deposited.
4. Mineral deposits and rock masses designated with reference to their origin; as, the siliceous formation about geysers; alluvial formations; marine formations.
5. A group of beds of the same age or period; as, the Eocene formation.
6. The arrangement of a body of troops, as in a square, column, etc.
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