1. excessive concentration on a single object or idea
2. a mental condition characterized by excessive concentration on a single idea or subject
Usage: psychology; dated

Examples

• His monomania with collecting vintage cars consumed all his free time.
• The detective’s monomania for solving cold cases made him work late every night.
• Her monomania about cleanliness drove her family crazy.
• The artist’s monomania with painting sunsets resulted in hundreds of similar works.
• What started as interest became monomania when he couldn’t stop researching the topic.
• The professor’s monomania for ancient history made his lectures incredibly detailed.