adverb (r)

• to a considerable degree(adv.all)

  Example:
  He relied heavily on others' data.
  

  Synonym:
  to a great extent
  

  source: wordnet30
• in a heavy-footed manner(adv.all)

  Example:
  He walked heavily up the three flights to his room.
  

  source: wordnet30
• with great force(adv.all)

  Example:
  She hit her arm heavily against the wall.
  

  source: wordnet30
• in a manner designed for heavy duty(adv.all)

  Example:
  A heavily constructed car.
  Heavily armed.
  

  source: wordnet30
• slowly as if burdened by much weight(adv.all)

  Synonym:
  heavy
  

  source: wordnet30
• in a labored manner(adv.all)

  Example:
  He breathed heavily.
  

  source: wordnet30
• indulging excessively(adv.all)

  Example:
  He drank heavily.
  

  Synonym:
  hard, intemperately
  Antonym:
  lightly
  

  source: wordnet30
• In a heavy manner; with great weight; as, to bear heavily on a thing; to be heavily loaded.(adverb)

  source: webster1913