Abbreviation for register: the machine used for payments (cash register); short for 'レジスター'.
レジでカード払いをお願いします。
Please pay by card at the register.
新しいレジを導入して会計が早くなった。
We introduced a new register and checkout became faster.
Abbreviation for the checkout counter or cashier; can refer to the place or the person handling payments.
レジが混んでいるので少し待ってください。
The checkout is busy, so please wait a moment.
レジに並んでいる客が多い。
There are many customers in line at the cash register.