Definitions of heavily:

• adverb:   to a considerable degree

  Example: "He relied heavily on others' data"

• adverb:   indulging excessively

  Example: "He drank heavily"

• adverb:   in a manner designed for heavy duty

  Example: "A heavily constructed car"

• adverb:   in a heavy-footed manner

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

• adverb:   with great force

  Example: "She hit her arm heavily against the wall"

• adverb:   slowly as if burdened by much weight