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Definitions of observer
  1. noun
    an expert who observes and comments on something

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  2. noun
    a person who becomes aware (of things or events) through the senses
Definition that contains observer
  • ha (astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day
  • clean (of behavior or especially language) free from objectionable elements; fit for all observers
  • magic an illusory feat; considered magical by naive observers
  • trick an illusory feat; considered magical by naive observers
  • witness a close observer; someone who looks at something (such as an exhibition of some kind)
  • illusion an illusory feat; considered magical by naive observers
  • deception an illusory feat; considered magical by naive observers
  • looker a close observer; someone who looks at something (such as an exhibition of some kind)
  • hubble United States astronomer who discovered that (as the universe expands) the speed with which nebulae recede increases with their distance from the observer (1889-1953)
  • viewer a close observer; someone who looks at something (such as an exhibition of some kind)
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