focal point - definition and synonyms

noun [countable] [usually singular] 

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singularfocal point
pluralfocal points
  1. 1
    the most important, interesting, or attractive part of something, that you concentrate on or pay particular attention to

    The focal point of the exhibition is a painting by Rembrandt.

  2. 2
    physics the point where light rays meet after being reflected by a mirror or passing through a lens, or the point from which they seem to start to spread