The treaty was formally signed in a grand ceremony, with representatives from each nation affixing their seals to the document.
该条约在一场盛大的仪式上正式签署，来自各国的代表在文件上加盖了他们的印章。
Which choice best defines “formally”?
C — In a formal manner. “formally” means in a formal manner.
Which word means “in a formal manner”?
C — formally. “formally” means in a formal manner.
formally — in a formal manner. In Chinese: 正式地.
formally is pronounced /ˈfɔːrməli/.
The treaty was formally signed in a grand ceremony, with representatives from each nation affixing their seals to the document. (该条约在一场盛大的仪式上正式签署，来自各国的代表在文件上加盖了他们的印章。)
officially, ceremoniously, properly — all close in meaning to formally (in a formal manner).
informally, casually — each the opposite of formally (in a formal manner).
Yes. formally is on the SAT Prep Basic list — the everyday academic words the SAT assumes you already have. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.