multiplication

Short definition from Wiktionary

Noun

1. 1
   The process of computing the sum of an addition with one and the same number a specified number of times (i.e. 4 times 5 = [0 +] 5 + 5 + 5 + 5 = 20) or any other analogous binary operation that combines other mathematical objects.
2. 2
   A calculation involving multiplication.
3. 3
   The process of multiplying or increasing in number; increase.