Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: Latin
Origin: commentari 'to comment', from comminisci; COMMENT1

commentator

 noun
     
Related topics: Media, Newspapers, Publishing
com‧men‧ta‧tor [countable]
1TCNAM someone who knows a lot about a particular subject, and who writes about it or discusses it on the television or radio:
political commentators
2AM someone on television or radio who describes an event as it is happening:
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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