What is the meaning of doubling?

noun

• Increase by a factor of two.
  • usage: "doubling with a computer took no time at all"
• Raising the stakes in a card game by a factor of 2.
  • usage: "I decided his double was a bluff"
  • synonyms: double

verb

• Increase twofold.
  • usage: "The population doubled within 50 years"
  • synonyms: double, duplicate
• Hit a two-base hit.
  • synonyms: double
• Bend over or curl up, usually with laughter or pain.
  • usage: "He doubled and vomited violently"
  • synonyms: double over, double, double up
• Do double duty; serve two purposes or have two functions.
  • usage: "She doubles as his wife and secretary"
  • synonyms: double
• Bridge: make a demand for (a card or suit.
  • synonyms: double
• Make or do or perform again.
  • usage: "He could never replicate his brilliant performance of the magic trick"
  • synonyms: duplicate, reduplicate, double, repeat, replicate