Define Parameter?

Parameter may be defined as a variable which may be given a series of values.In other words,it is something which can change in value,but which does refer to a "heading"or a measure under which similar things can be placed.For Example,a tailor's parameters would consist of headings such as length of leg,length of arm,width of shoulder,and so on.All of these parameters would vary from client,but all of his clients would possess these measurements..