Noun commentator has 2 senses
  1. observer, commentator - an expert who observes and comments on something
    --1 is a kind of expert
    --1 has particulars: annotator
    Derived form: verb commentate2
  2. commentator, reviewer - a writer who reports and analyzes events of the day
    --2 is a kind of writer, author
    Derived form: verb commentate1