(usually initial capital letter) a member of an Italian association that became prominent in 1878, advocating the redemption, or the incorporation into Italy, of certain neighboring regions (Italia irredenta) having a primarily Italian population.
a member of a party in any country advocating the acquisition of some region included in another country by reason of cultural, historical, ethnic, racial, or other ties.
pertaining to or supporting such a party or its doctrine.
Nor does the argument about dangerous irredentism stand up.
British Dictionary definitions for irredentism
a person who favours the acquisition of territory that once was part of his country or is considered to have been
of, relating to, or advocating this belief
C19: from Italian irredentista, from the phrase Italia irredenta, literally: Italy unredeemed, from ir-in-1 + redento redeemed, from Latin redemptus bought back; see redeem
(sometimes not capital) a member of an Italian association prominent in 1878 that sought to recover for Italy certain neighbouring regions (Italia irredenta) with a predominantly Italian population that were under foreign control
1882, member of It. political party which (after 1878) demanded the annexation of neighboring It.-speaking regions (Trieste, S. Tyrol, Nice, Corsica, etc.), from It. Irredentista, from (Italia) irredenta "unredeemed (Italy)."