Formation

Webster's Dictionary of the English Language

·noun A substance formed or deposited.

II. Formation ·noun The arrangement of a body of troops, as in a square, column, ·etc.

III. Formation ·noun The act of giving form or shape to anything; a forming; a shaping.

IV. Formation ·noun A group of beds of the same age or period; as, the Eocene formation.

V. Formation ·noun The manner in which a thing is formed; structure; construction; conformation; form; as, the peculiar formation of the heart.

VI. Formation ·noun Mineral deposits and rock masses designated with reference to their origin; as, the siliceous formation about geysers; alluvial formations; marine formations.