1. (

• formation

) an arrangement of people or things acting as a unit; "a defensive formation"; "a formation of planes" ;

2. (

• formation ,
• shaping

) the act of fabricating something in a particular shape ;

3. (

• constitution ,
• establishment ,
• formation ,
• organization ,
• organisation ,

) the act of forming or establishing something; "the constitution of a PTA group last year"; "it was the establishment of his reputation"; "he still remembers the organization of the club" ;

4. (

• geological_formation ,
• formation

) (geology) the geological features of the earth ;

5. (

• formation

) a particular spatial arrangement ;

6. (

• formation

) natural process that causes something to form; "the formation of gas in the intestine"; "the formation of crystals"; "the formation of pseudopods" ;

7. (

• formation ,

) creation by mental activity; "the formation of sentences"; "the formation of memories" ;