|formation /foɚˈmeɪʃən/ noun|
1 [noncount] : the act of forming or creating something • theformation [=development] of new ideas • The book explains theformation of the planets.
2 [count] : something that is formed or created • an interesting cloud formation • new word formations • rock formations
3 : an orderly arrangement or group of people, ships, or airplanes — often used after in [noncount] • The soldiers were marching information. • jets flying in formation [count] • The team ran on the field and lined up in a punt formation.