What is the meaning of quickening?

noun

• The process of showing signs of life.
  • usage: "the quickening of seed that will become ripe grain"
• The stage of pregnancy at which the mother first feels the movements of the fetus.
• The act of accelerating; increasing the speed.
  • synonyms: acceleration, speedup

verb

• Move faster.
  • usage: "The car accelerated"
  • synonyms: accelerate, speed up, speed, quicken
• Make keen or more acute.
  • usage: "whet my appetite"
  • synonyms: whet, quicken
• Give life or energy to.
  • usage: "The cold water invigorated him"
  • synonyms: quicken, invigorate
• Show signs of life.
  • usage: "the fetus quickened"
  • synonyms: quicken
• Give new life or energy to.
  • usage: "A hot soup will revive me"; "This will renovate my spirits"; "This treatment repaired my health"
  • synonyms: animate, recreate, reanimate, revive, renovate, repair, quicken, vivify, revivify