Special Drawing Rights - SDR

What Does Special Drawing Rights - SDR Mean?
An international type of monetary reserve currency, created by the International Monetary Fund (IMF) in 1969, which operates as a supplement to the existing reserves of member countries. Created in response to concerns about the limitations of gold and dollars as the sole means of settling international accounts, SDRs are designed to augment international liquidity by supplementing the standard reserve currencies.

Investopedia explains Special Drawing Rights - SDR
You can think of SDRs as an artificial currency used by the IMF and defined as a "basket of national currencies". The IMF uses SDRs for internal accounting purposes. SDRs are allocated by the IMF to its member countries and are backed by the full faith and credit of the member countries' governments.