'Diaspora' definitions:

Definition of 'diaspora'

(from WordNet)
noun
The body of Jews (or Jewish communities) outside Palestine or modern Israel
noun
The dispersion of the Jews outside Israel; from the destruction of the temple in Jerusalem in 587-86 BC when they were exiled to Babylonia up to the present time
noun
The dispersion or spreading of something that was originally localized (as a people or language or culture)

Definition of 'Diaspora'

From: GCIDE
  • Diaspora \Di*as"po*ra\, n. [Gr. ?. See Diaspore.] Lit., "Dispersion." -- applied collectively: (a) To those Jews who, after the Exile, were scattered through the Old World, and afterwards to Jewish Christians living among heathen. Cf. --James i. 1. (b) By extension, to Christians isolated from their own communion, as among the Moravians to those living, usually as missionaries, outside of the parent congregation. [Webster 1913 Suppl.]