|1.||psychiatry motivated by a persistent overriding idea or impulse, often associated with anxiety and mental illness|
|2.||continually preoccupied with a particular activity, person, or thing|
|3.||psychiatry a person subject to obsession|
|4.||a person who is continually preoccupied with a particular activity, person, or thing|
obsessive ob·ses·sive (əb-sěs'ĭv, ŏb-)
Of, characteristic of, or causing an obsession.