Newsy things are full of information, details, or news. A newsy letter from your pen pal fills you in on everything she's been doing since the last time she wrote.
Newsy is a great, informal way to describe a chatty conversation or an informative email. Your sister's newsy phone calls give you all the gossip from her summer camp, and a newspaper columnist's newsy interviews are incredibly detailed. Since the 1830s, newsy has meant "full of news," from news, literally "new things," and the Old English root neowe, "new."