盛大に

grandly; lavishly

→ 盛大だ
phrase Rare #37,535
grandly; lavishly Describes something done on a large, impressive, or celebratory scale. It can also mean “enthusiastically” when describing people getting excited or having fun.
JA: 卒業を盛大にお祝いしましょう。
EN: Let's celebrate the graduation in grand style.

そこで盛大に夜明けまで祝ってください

Please celebrate there in grand style until dawn.

— ライフ・イズ・ビューティフル (1997)

彼を空港で盛大に見送った

We gave him a grand send-off at the airport.