A dramatic gesture such as the waving of a flag.

“With many flourishes of the captured banner, they marched down the avenue.”

An ornamentation.

“His signature ended with a flourish.”

A ceremonious passage such as a fanfare.

“The trumpets blew a flourish as they entered the church.”

To thrive or grow well.

“The barley flourished in the warm weather.”

To prosper or fare well.

“The cooperation flourished as the customers rushed in the business.”

To be in a period of greatest influence.

“His writing flourished before the war.”