American English

Definition of fixation noun from the Oxford Advanced American Dictionary



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  1. 1[countable] a very strong interest in someone or something, that is not normal or natural a mother fixation fixation with/on somebody/something He's got this fixation with cleanliness.
  2. 2[uncountable] (technology) the process of a gas becoming solid nitrogen fixation
See the Oxford Advanced Learner's Dictionary entry: fixation