Definition of "modernism"

modernism

noun
countable and uncountable, plural modernisms
1. (uncountable) Modern or contemporary ideas, thought, practices, etc.
2. (countable) Anything that is characteristic of modernity.
3. Any of several styles of art, architecture, literature, philosophy, etc., that flourished in the 20th century.
  Quotations
  Penrod is so referential as to be almost a work of postmodernism—assuming Tarkington could have imagined such a thing with modernism itself just beginning to steamroll over him.
  2004 May, Thomas Mallon, “Hoosiers”, in The Atlantic‎
4. A religious movement in the early 20th century, condemned as heretical by Pope Pius X, which tried to reconcile Roman Catholic dogma with modern science and philosophy.