Rial/riːˈɔːl/ Definition 1 of 2Pro Tip 1/3Country-Specific Remember, 'rial' refers to specific Middle Eastern currencies, not all currencies. You can't use rials in Europe; they have euros. Pro Tip 2/3Pronunciation Pronounce 'rial' as /riˈɑːl/ to sound knowledgeable when discussing this currency. How many rials do you have? Pro Tip 3/3Exchange Important Familiarize with the exchange rate of the rial when traveling to avoid confusion. What's today's exchange rate for the Iranian rial?