Definition

1. Noun:
   • The act of making something twice as great or as many: "doubling" refers to the process of increasing an amount, size, or number by a factor of two.
   • The act of folding or bending something so that one part covers another: "doubling" can describe the action of folding something over upon itself.
   • The act of multiplying by two: In mathematics, "doubling" is the operation of multiplying a quantity by two.

Examples of Usage

• Noun:
  • The doubling of the company's profits this quarter surprised the investors.
  • She performed the doubling of the fabric to create a thicker layer.
  • The recipe called for the doubling of all ingredients to serve more guests.

Advanced Usage

• "Doubling down": In card games like blackjack, to double one's initial bet after seeing the first two cards, receiving exactly one more card. Figuratively, it means to strengthen one's commitment to a strategy or course of action.
  • Despite the risks, the CEO is doubling down on the new marketing campaign.
• "Doubling up": To share something, typically a room or bed, with another person; also, to bend over, as in laughter or pain.
  • We had to double up in the hotel rooms due to the overbooking.
  • He was doubling up in pain after the injury.

Variants and Related Words

• Double (verb, adjective, noun, adverb): To make or become twice as much; consisting of two parts; a person or thing that looks exactly like another; in a twofold manner.
  • She decided to double the recipe. (verb)
  • We booked a double room. (adjective)
• Doubly (adverb): To twice the extent or amount; in two ways.
  • You must be doubly careful when handling chemicals.

Synonyms

• Duplication: The action or process of duplicating something.
• Replication: The action of copying or reproducing something.
• Multiplication: The process of multiplying, especially increasing in number.

Related Phrases (Phrasal Verbs)

• Double as: To serve a second function or purpose.
  • The living room doubles as a home office.
• Double back: To turn around and go back the way one has come.
  • We missed the turnoff and had to double back.

Related Idioms

• See double: To see two images of a single object, often due to dizziness, intoxication, or a vision problem.
  • After the blow to his head, he was seeing double.
• On the double: Very quickly; at a run.
  • The sergeant ordered the troops to assemble on the double.

Noun

1. raising the stakes in a card game by a factor of 2
   • I decided his double was a bluff
2. increase by a factor of two
   • doubling with a computer took no time at all