noun The currency of Russia and some other countries in Eastern Europe, consisting of 100 kopecks.
The ruble has a long history dating back to medieval Russia.
The ruble is the currency of Russia.
Tourists visiting Russia may need to exchange their currency for rubles.
Exchange rates are often quoted in terms of rubles.
Russian companies may price their products in rubles for international sales.
In the context of a writer, 'ruble' may be used to describe the currency of Russia and other countries that formerly belonged to the Soviet Union.
In the context of a psychologist, 'ruble' may be used to refer to the concept of reinforcement in operant conditioning, where a reward is given to strengthen a particular behavior.
In the context of an economist, 'ruble' may be used to analyze the exchange rate of the Russian ruble and its impact on the country's economy.
In the context of a historian, 'ruble' may be used to study the economic history of Russia and the role of the ruble in shaping the country's development.