As a Noun: 1. The product obtained when a number is multiplied by itself a certain number of times. English = power. As a Verb or Adjective: 1. To multiply a number by itself. English = square X. 2. A number which is multiplied by itself. English = X squared. Note: 1. When writing numbers and formulas in mathematics, you write the power (Y) as a small number next to the main number (X). In English you say "X to the power of Y" (where X = a number and Y = a number). For example, "5 to the power of 2" or "5 squared" = 25, and "5 to the power of 3" or "5 cubed" = 125. The video shows how to sign "5 to the power of 2" or "5 squared".