In grand manner is a phrase that is used to describe an activity or event that has been executed in an impressive and striking way. There are many different synonyms for this phrase, including in grand style, with great pomp and circumstance, in a lavish manner, with great fanfare, and with great flourish. All of these synonyms emphasize the grandeur and extravagance of the event or activity that has been performed. Whether you are describing a wedding, a performance, or simply an extravagant party, the phrase in grand manner can help to convey the sense of awe and wonder that is felt by those who witness a truly magnificent display.