“Multiply” is a verb that means to increase in number, quantity, or extent by adding together several times. In mathematics, it specifically refers to the arithmetic operation of finding the product of two or more numbers. For example, when you multiply 3 by 4 (written as 3 × 4), you are essentially adding 3 four times (3 + 3 + 3 + 3), and the result is 12. Outside of math, it can be used more generally, like “The new marketing strategy will multiply our customer base”, meaning it will cause the customer base to increase significantly.