Meaning of FORMATION in English

FORMATION

[noun] [C]A formation is the way something is naturally made or the way it has been arranged.a rock formationcloud formationsThe formation of something is the way in which it is made, produced or shaped.The first sign of the disease is the formation of blisters on the skin.Activities which are done in formation are done in a pattern by a number of people, vehicles, etc..marching in (close) formation

Cambridge English vocab.      Кембриджский английский словарь.