1. the practice of forming or pursuing ideals, especially unrealistic ones
2. the belief that a perfect life, situation, etc. can be achieved, even when this is not very likely
3. any of various philosophical theories that regard ideas or the mind as fundamental in the universe
Usage: philosophy

Examples

• Her youthful idealism led her to believe she could change the world overnight.
• The politician’s idealism was admirable but impractical.
• His idealism about human nature was shattered by the betrayal.
• The movement was driven by idealism rather than realistic goals.
• She maintained her idealism despite repeated disappointments.
• The professor discussed Berkeley’s idealism in philosophy class.
• Their idealism motivated them to volunteer for the charity.