Parameter definition
An example of parameter is a guideline in which an experiment is to take place.
Roughly, a tuple of arguments could be thought of as a vector, whereas a tuple of parameters could be thought of as a covector (i.e., linear functional). When a function is called, a parameter tuple becomes "bound" to an argument tuple, allowing the function instance itself to be computed to yield a return value. This would be roughly analogous to applying a covector to a vector (by taking their dot product (or, rather, matrixproduct of row vector and column vect)) to obtain a scalar.
An experimental school that keeps expanding the parameters of its curriculum.
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Noun
Origin of parameter

From American Heritage Dictionary of the English Language, 5th Edition
 From French paramètre, from New Latin parametrum (“parameter"), from Ancient Greek παρά (para, “beside") + μέτρον (metron, “measure").
From Wiktionary