D defs.my
Entry 5 senses Webster, 1913

Formation

/(fŏr*mā"shŭn)/ · For·ma·tion · IPA /fɔɹˈmeɪʃ(ə)n/
01 n. The act of giving form or shape to anything; a forming; a shaping.
  1. 1.
    The act of giving form or shape to anything; a forming; a shaping.
  2. 2.
    The manner in which a thing is formed; structure; construction; conformation; form; as, the peculiar formation of the heart.
  3. 3.
    A substance formed or deposited.
  4. 4.
    Mineral deposits and rock masses designated with reference to their origin; as, the siliceous formation about geysers; alluvial formations; marine formations.(Geol.)
  5. 5.
    The arrangement of a body of troops, as in a square, column, etc.(Mil.)