backgrounder

noun ! Definition from Wiktionary (CC BY-SA). More about backgrounder at Wordnik → Where our words come from →

1. A briefing or document typically provided prior to a meeting or other event that gives basic details on subjects that are likely to be mentioned.

   One of the President's aides gave us a ten-minute backgrounder on the dairy industry before the meeting.

2. A person employed to draw backgrounds for a comic or cartoon.
3. A cattle farmer or rancher who runs a backgrounding operation.