英和辞典
  
whether
(h)wéðər(ホ)ウェざ
接続詞
❶(~する)かどうか
Ask your mother whether you can go.
Ask your mother whether you can go.
お母さんに君が行ってもいいかどうか聞いてごらん.
  ⦣ この whether の代わりに if を使ってもよい.
Please let me know whether you can come or not.=Please let me know whether or not you can come.
Please let me know whether you can come or not.=Please let me know whether or not you can come.
君が来られるか来られないか知らせてください.
I wondered whether to stay or to go home.
I wondered whether to stay or to go home.
私は残るべきか家に帰るべきか迷った.
❷whether A or B で AであろうとBであろうと
Whether it rains or not, I must go to see him.=I must go to see him whether it rains or not.
Whether it rains or not, I must go to see him.=I must go to see him whether it rains or not.
雨が降っても降らなくても私は彼に会いに行かねばならない.
It doesn't matter whether it rains or shines.
It doesn't matter whether it rains or shines.
雨が降ろうが晴れようが問題ではない.
  ⦣ It=whether 以下.