In math, the word "value" refers to a number. This number is often the result of a previous calculation, but it can also refer to the value of a variable or constant.
Common instances where the term "value" is used in mathematics are when discussing the mean value, or average, of a set of data and the value of a function at a certain point. For instance, the expression 3+3 has a value of 6, and the function f(x)=x+2 has the value 3 at f(1). In other subjects and industries, including real estate and finance, an item's value refers to its worth.