Meaning of FORMATION in English
n.1 the act or an instance of forming; the process of being formed.
2 a thing formed.
3 a structure or arrangement of parts.
4 a particular arrangement, e.g. of troops, aircraft in flight, etc.
5 Geol. an assemblage of rocks or series of strata having some common characteristic.
Etymology: ME f. OF formation or L formatio (as FORM)
Oxford English vocab. Оксфордский английский словарь. 2012