What is the meaning of nigh?

adjective

• Not far distant in time or space or degree or circumstances.
  • usage: "near neighbors"; "in the near future"; "they are near equals"; "his nearest approach to success"; "a very near thing"; "a near hit by the bomb"; "she was near tears"; "she was close to tears"; "had a close call"
  • synonyms: near, close
• Being on the left side.
  • usage: "the near or nigh horse is the one on the left"; "the animal's left side is its near or nigh side"
  • synonyms: near

adverb

• Near in time or place or relationship.
  • usage: "as the wedding day drew near"; "stood near the door"; "don't shoot until they come near"; "getting near to the true explanation"; "her mother is always near"; "The end draws nigh"; "the bullet didn't come close"; "don't get too close to the fire"
  • synonyms: near, close
• Of actions or states. ( slightly short of or not quite accomplished; all but)
  • usage: "the job is (just) about done"; "the baby was almost asleep when the alarm sounded"; "we're almost finished"; "the car all but ran her down"; "he nearly fainted"; "talked for nigh onto 2 hours"; "the recording is well-nigh perfect"; "virtually all the parties signed the contract"; "I was near exhausted by the run"; "most everyone agrees"
  • synonyms: about, almost, most, nearly, near, virtually, well-nigh