2. (noun)formation, shaping the act of fabricating something in a particularshape
3. (noun)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. (noun)geological formation, formation (geology) the geological features of the earth
6. (noun)formation naturalprocess that causes something to form "the formation of gas in the intestine"; "the formation of crystals"; "the formation of pseudopods"
7. (noun)formation creation by mental activity "the formation of sentences"; "the formation of memories"