Definition: an unhealthy and compulsive preoccupation with something or someone
Similar words: preoccupation
Definition: an idea that preoccupies the mind and holds the attention
Synonyms: obsession, compulsion
Definition: an irrational motive for performing trivial or repetitive actions, even against your will
Usage: her compulsion to wash her hands repeatedly
Similar words: irrational motive
Definition: a motivation that is inconsistent with reason or logic