What is the meaning of closely?

adverb

• In a close relation or position in time or space.
  • usage: "the onsets were closely timed"; "houses set closely together"; "was closely involved in monitoring daily progress"
• In an attentive manner.
  • usage: "he remained close on his guard"
  • synonyms: close, tight
• In a close manner.
  • usage: "the two phenomena are intimately connected"; "the person most nearly concerned"
  • synonyms: intimately, nearly