1Refers to what remains, or other people/things not already mentioned; used to sum up everything else after a list.
出席者は佐藤さんと田中さん、その他数名だった。
The attendees were Mr. Sato, Ms. Tanaka, and a few others.
アンケートには「賛成」「反対」「その他」という選択肢があった。
The survey had the options "agree," "disagree," and "other."
名簿に載っていない人は、その他として扱われる。
People not listed in the roster are treated as "other."
2Means 'in addition' or 'besides that'; used to add further information onto what has already been said.
この料金には宿泊費が含まれ、そのほかに食事代がかかります。
This price includes accommodation; in addition, there is a charge for meals.
パスポートとチケット、そのほか現金も少し用意しておこう。
Let's prepare our passport and ticket, and besides that, a bit of cash as well.
会議室の予約は済んだ。そのほか必要な準備はあるだろうか。
The meeting room has been booked. Is there anything else we need to prepare?
3Placed at the end of a list to mean 'and so forth' or 'and the like'.
冷蔵庫には野菜や卵、牛乳、その他いろいろ入っている。
The fridge has vegetables, eggs, milk, and various other things.
店では文房具、雑貨、その他ちょっとしたプレゼントも扱っている。
The shop carries stationery, sundries, and other small gift items.