'briefing' definitions:

Definition of 'briefing'

From: WordNet
noun
Detailed instructions, as for a military operation

Definition of 'briefing'

From: GCIDE
  • briefing \briefing\ n.
  • 1. giving detailed instructions, as for a military operation. [WordNet 1.5]
  • 2. a detailed set of instructions before an operation, given to those who are to execute it. [PJC]
  • 3. a summary report of an operation or event after it has occurred, by a participant or observer. [PJC]

Synonyms of 'briefing'

From: Moby Thesaurus