How can Modernism be defined?

Answer:modern character or quality of thought

mod·ern·ism

/ˈmädərnˌizəm/

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noun

modern character or quality of thought, expression, or technique.

"when he waxes philosophical, he comes across as a strange mix of nostalgia and modernism"

a style or movement in the arts that aims to break with classical and traditional forms.

a movement toward modifying traditional beliefs in accordance with modern ideas, especially in the Roman Catholic Church in the late 19th and early 20th centuries.