Sri Lankan Monetary unit is the official currency of the island nation of Sri Lanka. The currency is often referred to as rupees or Lankan rupees, but there are several other synonyms used across the country and in international financial circles. Some of the commonly used synonyms for the Sri Lankan Monetary unit include SL rupees, SLR, LKR, and Lankan currency. Additionally, the currency is also sometimes referred to as Ceylonese rupees, a name that dates back to the country's colonial past. No matter what the synonym used, the Sri Lankan Monetary unit remains an essential aspect of the nation's economy and an important measure of its economic progress and stability.