formally

正式に

公式の規則に従って、または物事を正式なものとして認める形で。

やさしい英語で： In a way that follows official rules or makes something official.

• He formally accepted the offer.
• The committee formally approved the plan yesterday.
• Have you formally requested permission?

類義語： officially

反対語： informally

よく使う表現： formally announce, formally request

格式張って、改まって

大切な場にふさわしく、礼儀正しく、改まったやり方で。

やさしい英語で： In a serious, polite, or traditional way suitable for important occasions.

• Everyone dressed formally for dinner.
• She spoke formally to the guests.
• Why are you addressing me so formally?

類義語： ceremoniously

反対語： informally, casually

よく使う表現： dress formally, speak formally

形式的に、形式的手法で

論理や数学などの体系に定められた厳密な規則を使って。

やさしい英語で： Using strict rules of logic, mathematics, or another system.

• The theorem was proved formally.
• We must define these terms formally.
• The software was formally verified using mathematical methods.

類義語： rigorously

よく使う表現： prove formally, formally define