Definition of reality noun from the Oxford Advanced American Dictionary

      

    reality

     noun
    noun
    NAmE//riˈælət̮i//
     
    (pl. realities)
     
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  1. 1[uncountable] the true situation and the problems that actually exist in life, in contrast to how you would like life to be She refuses to face reality. You're out of touch with reality. The reality is that there is not enough money to pay for this project. They seemed to have the perfect marriage but the reality was very different.
  2. 2[countable] a thing that is actually experienced or seen, in contrast to what people might imagine the harsh realities of life This decision reflects the realities of the political situation. The paperless office is still far from being a reality. Will time travel ever become a reality?
  3. 3 [uncountable] reality television/TV/shows/series/contestants television/shows, etc. that use real people (not actors) in real situations, presented as entertainment the reality show “American Idol”
  4. Idioms used to say that a situation is different from what has just been said or from what people believe Outwardly she seemed confident but in reality she felt extremely nervous. In reality, human beings and dinosaurs never lived on earth at the same time. see also virtual reality
See the Oxford Advanced Learner's Dictionary entry: reality