1. the Italian region on the island of Sardinia; the kingdom of Sardinia was the nucleus for uniting Italy during the 19th century • Syn: Sardinia • Instance Hypernyms: Italian region • Part Holonyms: Italy, Italian Republic, Italia 2. an island in the Mediterranean to the west of Italy • Syn: Sardinia • Derivationally related forms: Sardinian (for: Sardinia) • Instance Hypernyms: island • Part Holonyms: Mediterranean, Mediterranean Sea