1. an arrangement of people or things acting as a unit

- a defensive formation

- a formation of planes

Definition categories: group, arrangement

2. the act of fabricating something in a particular shape

Similar word(s): shaping

Definition categories: act, fabrication, manufacture, manufacturing

3. the act of forming or establishing something

Similar word(s): constitution, establishment, organisation, organization

Definition categories: act, beginning, commencement, start

4. (geology) the geological features of the earth

Definition categories: object

5. a particular spatial arrangement

Definition categories: man–made, arrangement, placement

6. natural process that causes something to form

- the formation of gas in the intestine

- the formation of crystals

- the formation of pseudopods

Definition categories: process, action, activity

7. creation by mental activity

- the formation of sentences

- the formation of memories

Definition categories: act