A money order or draft (instruments used to transfer or remit money, such as postal money orders).
郵便為替で家族に仕送りを送った。
I sent money to my family by postal money order.
この為替は銀行で現金化できますか？
Can this draft be cashed at the bank?
Exchange, especially foreign exchange — currency exchange or matters concerning exchange rates and the FX market.
為替レートが円高に振れると輸入業者は影響を受ける。
When the exchange rate moves toward a stronger yen, importers are affected.
外国為替市場でドルを買う動きが強まっている。
Buying of dollars in the foreign exchange market is strengthening.
海外送金の際は為替手数料に注意してください。
Be careful about exchange fees when sending money abroad.