Medical Dictionary
obsession
noun ob·ses·sion \äb-ˈsesh-ən, əb-\
Medical Definition of OBSESSION
: a persistent disturbing preoccupation with an often unreasonable idea or feeling; also : something that causes such preoccupation—compare compulsion, phobia
—ob·ses·sion·al \-ˈsesh-nəl, -ən-əl\ adjective
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