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Definition of obsess verb from the Oxford Advanced Learner's Dictionary

obsess

verb
 
/əbˈses/
 
/əbˈses/
Verb Forms
present simple I / you / we / they obsess
 
/əbˈses/
 
/əbˈses/
he / she / it obsesses
 
/əbˈsesɪz/
 
/əbˈsesɪz/
past simple obsessed
 
/əbˈsest/
 
/əbˈsest/
past participle obsessed
 
/əbˈsest/
 
/əbˈsest/
-ing form obsessing
 
/əbˈsesɪŋ/
 
/əbˈsesɪŋ/
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  1. [transitive, usually passive] to completely fill your mind so that you cannot think of anything else, in a way that is not reasonable or normal
    • be obsessed by somebody/something He's obsessed by computers.
    • be obsessed with somebody/something She's completely obsessed with him.
    • obsess somebody 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.
    see also self-obsessed
  3. Word Originlate Middle English (in the sense ‘haunt, possess’, referring to an evil spirit): from Latin obsess- ‘besieged’, from the verb obsidere, from ob- ‘opposite’ + sedere ‘sit’. The current sense dates from the late 19th cent.
See obsess in the Oxford Advanced American Dictionary

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noun
 
 
From the Topic
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