レジreji

1. noun(cash) register
   くしくも、レジでの合計額ごうけいがくは７７７円えんであった。↗

   Strangely, the cash register's total was 777 yen.
2. nouncheckout (counter); cashier
   レジはどこですか。↗

   Where's the checkout counter?

• SynonymレジスターNeutralFull loanword form for the register or checkout counter; also a computer register. In everyday speech the short form 「レジ」 is standard.
• Synonym金銭登録機きんせんとうろくきFormalThe formal name for a cash register, found mainly in technical descriptions and other written contexts; people say 「レジ」 in daily life.
• SynonymキャッシュレジスターNeutralFull loanword form for a cash register, but rarely used; the short form 「レジ」 is the everyday word.
• RelatedキャッシャーNeutralLoanword for the cashier — the person who takes payment and gives change, not the machine itself.

For the checkout counter or cash register, 「レジ」 is the default in everyday speech. 「レジスター」 and 「キャッシュレジスター」 are the full loanword forms, 「金銭登録機」 the formal name used in writing, and 「キャッシャー」 refers to the cashier, the person.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 事務じむ機きの一種いっしゅである金銭きんせん登録とうろく器き（キャッシュレジスター）の俗称ぞくしょう。