What is the meaning of grounding?

noun

• Education or instruction in the fundamentals of a field of knowledge.
  • usage: "he lacks the foundation necessary for advanced study"; "a good grounding in mathematics"
  • synonyms: foundation
• Fastening electrical equipment to earth.
  • synonyms: earthing

verb

• Fix firmly and stably.
  • usage: "anchor the lamppost in concrete"
  • synonyms: anchor, ground
• Confine or restrict to the ground.
  • usage: "After the accident, they grounded the plane and the pilot"
  • synonyms: ground
• Place or put on the ground.
  • synonyms: ground
• Instruct someone in the fundamentals of a subject.
  • synonyms: ground
• Bring to the ground.
  • usage: "the storm grounded the ship"
  • synonyms: ground, strand, run aground
• Hit or reach the ground.
  • synonyms: ground, run aground
• Throw to the ground in order to stop play and avoid being tackled behind the line of scrimmage.
  • synonyms: ground
• Hit a groundball.
  • usage: "he grounded to the second baseman"
  • synonyms: ground
• Hit onto the ground.
  • synonyms: ground
• Cover with a primer; apply a primer to.
  • synonyms: prime, ground, undercoat
• Connect to a ground.
  • usage: "ground the electrical connections for safety reasons"
  • synonyms: ground
• Use as a basis for; found on.
  • usage: "base a claim on some observation"
  • synonyms: establish, base, ground, found