Added 10 October 2026 riyadh noun Categories: PlacesRare Words noun ! Definition from WordNet 3.1, Princeton University. More about riyadh at Wordnik → Where our words come from → Joint capital (with Mecca) of Saudi Arabia located in the central oasis; largest city in Saudi Arabia. Related Words: arabiasaudiriyadkingdomafpriadcapitalarhereriazriadh Back to today's word