It's the standard definition in a software development context, which you can find all over the place. Here are some examples:

> "Parameters are named variables declared as part of a function. They are used to reference the arguments passed into the function."

-- MDN, https://developer.mozilla.org/en-US/docs/Glossary/Parameter

> "A parameter is a special kind of variable used in a function to refer to one of the pieces of data provided as input to the function. These pieces of data are the values of the arguments with which the function is going to be called/invoked."

-- Programming Fundamentals, https://press.rebus.community/programmingfundamentals/chapte...

> "Parameters refer to the variables listed in a function's declaration, defining the input that the function can accept. Arguments, however, are the actual values passed to the function when it is called, filling the parameters during execution."

-- https://www.geeksforgeeks.org/computer-science-fundamentals/...

While you might be tempted to "do you" and use your own idiosyncratic definitions, I advise against it, since it makes it difficult for you to understand what others are saying, and vice versa.