Definition:
In Excel, arguments are used in functions. They are the part of the function enclosed in round brackets (parentheses) following the functions name. Arguments supply the data for the function to use in its calculations. In Excel, arguments are most likely to be cell references.
Example:
=SUM(A1:A6)In this example, the argument for the SUM function is the range (A1:A6).
Note: Before entering the function into the spreadsheet, it is a good idea to enter the data first. This way, the cell reference for the function's arguments will be entered correctly the first time.

