もしくは

conjunction

or; otherwise

Used to present alternatives, often in formal or written contexts. Similar to または, but もしくは can sound slightly more formal or legalistic.

• 電でん話わもしくはメールでご連れん絡らくください。

  Please contact us by phone or email.

• 必ひつ要よう書しょ類るいは窓まど口ぐちもしくは郵ゆう送そうで提てい出しゅつできます。

  The required documents can be submitted at the counter or by mail.