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3. multiplication-an arithmetic operation that is the inverse of division; the product of two numbers is computed; the multiplication of four by three gives twelve; four times three equals twelve. times. arithmetic operation-a mathematical operation involving numbers.
Definition of division for English Language Learners. : 1  the act or process of dividing something into parts : the way that something is divided. : 2  something that physically divides or separates something else. 3  mathematics : the process of finding out how many times one number is contained in another.