formation noun

1 making/developing sth

ADJ. policy the top civil servants who are responsible for policy formation

VERB + FORMATION lead to, result in This dispute led to the formation of a new breakaway group.

2 arrangement/group/pattern

ADJ. close, tight | battle The troops advanced in battle formation. | family, household, social changing patterns of marriage and family formation

FORMATION + NOUN dancing, flying

PREP. in a … ~ The men were grouped in a close formation. | in ~ a squadron of planes flying in formation

3 sth that has been formed

ADJ. cloud, geological, rock | military, political