- 1[transitive, often passive] obsess somebody to completely fill your mind so that you cannot think of anything else, in a way that is not normal He's obsessed by computers. She's completely obsessed with him. The need to produce the most exciting newspaper story obsesses most journalists.
- 2[intransitive] obsess (about something) to be always talking or worrying about a particular thing, especially when this annoys other people I think you should try to stop obsessing about food.
NAmE//əbˈsɛs//Verb Forms present simple I / you / we / they obsess
he / she / it obsesses
past simple obsessed
-ing form obsessing