Wordnet 3.0
NOUN (1)
1. 
 someone who broadcasts the news; 
The Collaborative International Dictionary of English v.0.48:
newscaster \newscaster\ n.
   Someone who broadcasts the news.
   [WordNet 1.5]
WordNet (r) 3.0 (2006):
newscaster
    n 1: someone who broadcasts the news