Noun: obsession ub'se-shun
- An irrational motive for performing trivial or repetitive actions, even against your will
"His obsession with checking the locks multiple times became problematic";
- compulsion
- An unhealthy and compulsive preoccupation with something or someone
"His obsession with cleanliness bordered on a disorder";
- fixation
Derived forms: obsessions
Type of: irrational motive, preoccupation
Encyclopedia: Obsession