Definition of "gusto"

Sing, Johnny One-Note / Sing out with gusto / And just overwhelm all the crowd

1937, Rodgers and Hart (lyrics and music), “Johnny One Note”

And the sound increases … the power grows … gusto becomes something else: rage.

1993, Paul Chadwick, The Dictator’s Dream, Dark Horse Books

Germany regeared for the second half: same shape, more control. Mexico had lost some of their vim. And before long the game had turned on its head, with Germany able to keep the ball now, Kroos hitting his range, and Mexico less adept at seizing possession, unable to spring forward with such gusto.

2018 June 17, Barney Ronay, “Mexico’s Hirving Lozano stuns world champions Germany for brilliant win”, in Katharine Viner, editor, The Guardian‎, London: Guardian News & Media, archived from the original on 5 August 2019