1796, in the abstract sense, originally "belief that reality is made up only of ideas," from ideal (adj.) + -ism; on model of French idéalisme. Meaning "representing things in an ideal form" is from 1829.
实用例句
1. She never lost her respect for the idealism of the 1960s.
她对20世纪60年代的理想主义一直心怀崇敬。
来自柯林斯例句
2. He was full of youthful idealism.
他满脑子都是年轻人的理想主义。
来自《权威词典》
3. They're channelling the natural resources of youthful idealism into political action.