What is the mean by Adjustable rate mortgage (ARM) in real estate?

If you are searching for the meaning of Adjustable-rate mortgage (ARM) in real estate and also a definition of Adjustable-rate mortgage (ARM),  then this blog post is helpful for you

Definition

A mortgage loan whose interest rate fluctuates according to the movements of an assigned index or a designated market indicator--such as the weekly average of one-year U.S. Treasury Bills--over the life of the loan. To avoid constant and drastic fluctuations, ARMs typically limit how often and by how much the interest rate can vary.