Definitions of further:

• verb:   promote the growth of
• verb:   contribute to the progress or growth of
• adjective:   more distant in especially degree

  Example: "Nothing could be further from the truth"

• adverb:   to or at a greater extent or degree or a more advanced stage (`further' is used more often than `farther' in this abstract sense)

  Example: "Further complicated by uncertainty about the future"

• adverb:   in addition or furthermore

  Example: "If we further suppose"

• adverb:   to or at a greater distance in time or space (`farther' is used more frequently than `further' in this physical sense)

  Example: "Went only three miles further"