What does "re-formation" mean?

A new formation (a subsequent coming together of the elements of a former grouping).

What is a synonym for "re-formation"?

Common synonyms include: about face, alchemy, assimilation, assumption, change, copy.

Pronounced //ˌɹifɔɹˈmeɪʃən//.

/ˌɹifɔɹˈmeɪʃən/ noun

noun ·Rare ·Advanced level

Noun

1
A new formation (a subsequent coming together of the elements of a former grouping).
2
forming again (especially with improvements or removal of defects); renewing and reconstituting wordnet

Originally a variant of reformation. In later use also independently from re- + formation, after re-form.