Definitions of brief:

• noun:   a condensed written summary or abstract
• noun:   a document stating the facts and points of law of a client's case
• verb:   give essential information to someone

  Example: "The reporters were briefed about the President's plan to invade"

• adjective:   of short duration or distance

  Example: "A brief stay in the country"

• adjective:   concise and succinct

  Example: "Covered the matter in a brief statement"

• adjective:   (of clothing) very short

  Example: "A brief bikini"