Grand; magnificent; on a large, impressive scale (often describing ceremonies or events).
結婚式は盛大に行われ、多くの人が集まった。
The wedding was held on a grand scale, and many people gathered.
新店のオープンを盛大に祝った。
They celebrated the opening of the new store in a grand way.
盛大な花火大会が夏に開催される。
A grand fireworks festival is held in the summer.
Forceful; powerful; vigorous (describing strong or energetic action or expression).
選手たちは盛大な気迫で試合に臨んだ。
The players approached the match with vigorous determination.
彼のスピーチは盛大で聴衆を引きつけた。
His speech was powerful and drew the audience in.
公演は演者の盛大な演技で盛り上がった。
The performance was enlivened by the actors' vigorous acting.