symphonism
noun
sym·​pho·​nism
| \ ˈsim(p)-fə-ˌni-zəm
\
\
Definition of symphonism
1
: musical composition in a symphonic style
especially
: musical composition of complexity and seriousness of purpose regarded as appropriate to the symphony
… their suspicion of the abstract symphonic genre was deeply rooted enough to provoke calls for a new kind of proletarian symphonism based on mass song. — Pauline Fairclough, A Soviet Credo, 2006
2
the writing of symphonies
So Debussy and Satie began to seek a way out of the hulking fortresses of Beethovenian symphonism and Wagnerian opera.— Alex Ross, The Rest Is Noise, 2007