B1
the rate at which the money of one country can be changed for the money of another country
Dictionary examples:
The exchange rate made my wallet cry when I tried to buy sushi in Tokyo. (0.0)
Thanks to the exchange rate, I felt like a millionaire... until I bought a coffee. (0.0)
I checked the exchange rate and realized I could only afford half a pizza in Italy. (0.0)
The Money Ready Reckoner gives the exchange rate for any country you plan to visit and shows how much currency you will get. (44.4)