The word “diaspora” means; any group migration or flight from a country or region. Synonyms: dispersion, dissemination, migration, displacement, scattering.

any group that has been dispersed outside its traditional homeland, especially involuntarily, as Africans during the trans-Atlantic slave trade. 

( usually initial capital letter ) the scattering of the Jews to countries outside of Palestine after the Babylonian captivity.

( often initial capital letter ) the body of Jews living in countries outside Israel.

( often initial capital letter ) such countries collectively: the return of the Jews from the Diaspora.

Word Story 

The history of the term diaspora shows how a word’s meaning can spread from a very specific sense to encompass much broader ones. 
Diaspora first entered English in the late 19th century to describe the scattering of Jews after their captivity in Babylonia in the 5th century B.C.E. The term originates from the Greek diasporá, meaning “a dispersion or scattering,” found in Greek translations of the Hebrew Bible (Deuteronomy 25).