| Noun | 1. | Matterhorn - a mountain in the Alps on the border between Switzerland and Italy (14,780 feet high); noted for its distinctive shapeItalia, Italian Republic, Italy - a republic in southern Europe on the Italian Peninsula; was the core of the Roman Republic and the Roman Empire between the 4th century BC and the 5th century AD Alps, the Alps - a large mountain system in south-central Europe; scenic beauty and winter sports make them a popular tourist attraction | |