(2) A number that is the product of a whole number multiplied by itself; a whole number to the second power. 25 is a square number, because 25 = 5 x 5. A square number can be represented by a square array. Example: 352 = 35 x 35 = 1225.

a number that can be expressed as the product of two equal numbers, e.g. 36 = 6 × 6, and so 36 is a square number.

A number of the form n^2.

an integer that is a perfect square of another integer.  For example, 49 is the square of 7.  That is, a product of a number multiplied by itself.

A number that is the result of multiplying an integer by itself. Any square number of dots can be arranged in a square array.

In mathematics, a square number, sometimes also called a perfect square, is an integer that can be written as the square of some other integer. (In other words, a number whose square root is an integer.) So for example, 9 is a square number since it can be written as 3 × 3.