n. 1
A dramatic gesture such as the waving of a flag.
With many flourishes of the captured banner, they marched down the avenue.
n. 2
An ornamentation.
His signature ended with a flourish.
v. 1
To thrive or grow well.
The barley flourished in the warm weather.
v. 2
To prosper or fare well.
The town flourished with the coming of the railway.

Forms

Plural: flourishes → fanfares, shows, flaunts, displays…
Past participle: flourished
e.g. flourished → prospered, thrived, blossomed, grown…

Example sentences

Use in printed books, per decade from 1850 to 2019.

4 letters: show¹, rock¹, grow¹, wave¹, boom¹, dash¹, brag¹, curl¹, pomp¹
5 letters: swing¹, bloom¹, vapor², boast¹, vaunt
6 letters: flower², expand², parade², waving², thrive¹, abound², vapour, flaunt¹, tucket, paraph
7 letters: display², succeed², blossom², prosper², fanfare², swagger², bluster²
8 letters: brandish²
9 letters: spectacle³, pageantry³, luxuriate, gasconade
11 letters: brandishing³, ostentation⁴
13 letters: embellishment⁴

The small number after each word is its number of syllables (vapor² = 2 syllables).