LCM stands for "Least Common Multiple".

The LCM of two or more integers is the smallest positive integer that is divisible by all of the given integers without leaving any remainder.

For example, the LCM of 4 and 6 is 12, because 12 is the smallest multiple of both 4 and 6.

The LCM is an important concept in mathematics and is used in many areas, such as algebra, number theory, and geometry. It is often used in solving problems related to fractions, ratios, and proportions.