または
Present alternatives in formal language
You'll be able to connect two choices with a clear written or formal equivalent of or.

現金またはカードで払ってください。
genkin mata wa kaado de haratte kudasai.
What do you think this sentence means?
Please pay by cash or card.
Present formal alternatives
または connects alternatives in instructions or formal explanations. It means or, allowing a choice according to the surrounding rule.
電話またはメールで連絡してください。
denwa mata wa meeru de renraku shite kudasai.
Please contact us by telephone or email.
Form and use または
It is more formal than many everyday spoken choices. It does not by itself settle whether choosing both is allowed; the instruction must make that clear when it matters.
電話またはメールで連絡してください。
denwa mata wa meeru de renraku shite kudasai.
Please contact us by telephone or email.
月曜日または火曜日に来てください。
getsuyoubi mata wa kayoubi ni kite kudasai.
Please come on Monday or Tuesday.
予約は電話またはメールでお願いします。
yoyaku wa denwa matawa meeru de onegai shimasu.
Please make reservations by phone or email.
ご記入は黒または青のペンでお願いします。
gokinyuu wa kuro matawa ao no pen de onegai shimasu.
Please fill this out in black or blue pen.
入口でチケットまたは予約のメールをお見せください。
iriguchi de chiketto matawa yoyaku no meeru o omise kudasai.
Please show your ticket or your booking email at the entrance.
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