What is the meaning of halfway?

adjective

• Equally distant from the extremes.
  • synonyms: center, middle, midway
• At a point midway between two extremes.
  • usage: "at the halfway mark"
• Including only half or a portion.
  • usage: "halfway measures"

adverb

• At half the distance; at the middle.
  • usage: "he was halfway down the ladder when he fell"
  • synonyms: midway