formation -
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.
formational adj. [ME f. OF formation or L formatio (as FORM)]
