Currency Pair
Also known as: FX Pair, Forex Pair
A currency pair quotes one currency (the base) in terms of another (the quote). In EURUSD = 1.0850, 1 euro buys 1.0850 US dollars. Buying the pair means buying the base and selling the quote.
Pairs are classified as majors (USD-quoted top pairs like EURUSD, GBPUSD, USDJPY), minors / crosses (no USD, like EURGBP), and exotics (one developed and one emerging currency, like USDTRY). Liquidity, spread, and behavior differ markedly across these categories.