1. in an obsessive manner; with excessive preoccupation or compulsive focus

Examples

• She obsessionally checked her phone every few minutes.
• He obsessionally organized his books by color and size.
• The artist obsessionally perfected every detail of the painting.
• She obsessionally worried about making mistakes at work.
• He obsessionally counted calories in everything he ate.
• The collector obsessionally researched the history of each item.