ｏｒ

conjunction

or

English loanword used as a conjunction in Japanese, similar to English 'or'. Often seen in technical or informal contexts.

• コーヒー ｏｒ 紅こう茶ちゃ、どちらがいいですか。

  Coffee or tea — which would you like?

noun

OR (Boolean operator)

Only when written ＯＲ

Used in logic, programming, and mathematics to denote the logical OR operation. Typically written in full-width as ＯＲ.

• この回かい路ろはＡＮＤとＯＲで構こう成せいされている。

  This circuit is composed of AND and OR gates.