What is the meaning of endlessly?

adverb

• Continuing forever without end.
  • usage: "there are infinitely many possibilities"
  • synonyms: infinitely
• With unflagging resolve.
  • usage: "dance inspires him ceaselessly to strive higher and higher toward the shining pinnacle of perfection that is the goal of every artiste"
  • synonyms: ceaselessly, incessantly, unceasingly, unendingly, continuously
• Spatial sense. ( without bounds)
  • usage: "the Nubian desert seemed to stretch out before them endlessly"
• All the time; seemingly without stopping.
  • usage: "a theological student with whom I argued interminably"; "her nagging went on endlessly"
  • synonyms: interminably