What is the meaning of drilled?

verb

• Make a hole, especially with a pointed power or hand tool.
  • usage: "don't drill here, there's a gas pipe"; "drill a hole into the wall"; "drill for oil"; "carpenter bees are boring holes into the wall"
  • synonyms: bore, drill
• Train in the military, e. G., in the use of weapons.
  • synonyms: drill
• Learn by repetition.
  • usage: "We drilled French verbs every day"; "Pianists practice scales"
  • synonyms: drill, exercise, practice, practise
• Teach by repetition.
  • synonyms: drill
• Undergo military training or do military exercises.
  • synonyms: drill

adjective

• Trained in a skill by repetitious practice.
  • usage: "well-drilled in military procedures"