multiplication

/ˌmʌltɪplɪˈkeɪʃən/
noun
  1. The mathematical process of adding a number to itself a certain number of times; the operation of finding the product of two or more numbers.
    • Learning multiplication tables helps you calculate quickly.
    • In the problem 4 × 5, the multiplication gives a product of 20.
    • The teacher explained that multiplication is repeated addition.
  2. A large increase in the number or amount of something.
    • The multiplication of new businesses boosted the local economy.
    • Social media led to the multiplication of rumors within hours.
    • The rapid multiplication of rabbits in the area has become a problem.