Definition of "briefer"

briefer¹

/ˈbɹiːfə/

noun
plural briefers
1. One who provides a briefing.
  Quotations
  The briefers tried to prove the White House’s case that Iran is shipping deadly weapons, including armor-piercing explosives, to Shiite militias in Iraq.
  2007 February 13, “Iran and the Nameless Briefers”, in New York Times‎

briefer²

/ˈbɹiːfə/

adjective
1. comparative form of brief: more brief