adverb (r)

• in a compact manner or state(adv.all)

  Example:
  The children were packed compactly into the car.
  

  source: wordnet30
• with concise and precise brevity; to the point(adv.all)

  Example:
  He wrote compactly but clearly.
  

  Synonym:
  succinctly
  

  source: wordnet30
• taking up no more space than necessary(adv.all)

  Example:
  Liquid food compactly stored in a pressurized tank.
  

  source: wordnet30
• In a compact manner; with close union of parts; densely; tersely.(adverb)

  source: webster1913