Monomania

Pronunciation: /ˈmoʊnoʊˈmeɪniə/

Monomania (noun)

  1. A strong, fixed focus on one idea or activity, so other thoughts and actions become less important.
  2. In older medical writing, a condition where a person shows intense interest in one subject, with limited change in other areas.

Examples

  • Her monomania made her ignore everything except one goal.
  • His monomania kept him focused on one idea all day.