What is another word for in a grand manner?
Pronunciation: [ɪn ɐ ɡɹˈand mˈanə] (IPA) 
When you want to describe something being done in a grand manner, there are a number of synonyms that can be used. Some popular alternatives include "lavishly," "sumptuously," "ostentatiously," "extravagantly," and "splendidly." Each of these words conveys a sense of extravagance or opulence, suggesting that something is being done in a flamboyant or impressive way. Other possible synonyms include "majestically," "regally," "magnificently," "impressively," and "dramatically." Ultimately, the choice of words depends on the context and the specific impression that the writer or speaker wants to convey when describing something being done in a grand manner.
