(of a living organism) grow or develop in a healthy or vigorous way, especially as the result of a particularly congenial environment

wild plants flourish on the banks of the lake

wave (something) about to attract attention

‘Happy New Year!’ he yelled, flourishing a bottle of whisky

a bold or extravagant gesture or action, made especially to attract attention

with a flourish, she ushered them inside

an impressive and successful act or period

United produced a late second-half flourish

a fanfare played by brass instruments

a flourish of trumpets