1. the quality or state of being obsessed; excessive preoccupation with something

Examples

• His obsessiveness with cleanliness made him wash his hands dozens of times a day.
• The artist’s obsessiveness about detail resulted in incredibly realistic paintings.
• Her obsessiveness with social media was affecting her sleep and work performance.
• The coach’s obsessiveness with winning created a stressful environment for the team.
• Therapy helped him recognize that his obsessiveness was causing problems in his relationships.
• The detective’s obsessiveness with the case eventually led to solving the mystery.