Definitions for "Ordinal scale"
A measuring system in which the numbers used are monotonically related to the magnitude of the objects being measured.  Monotonicity means the larger the object, the larger the number.
A ranking of values (amounts, numbers, scores) from greatest to least, lowest to highest, first to last, etc., but by a category instead of a number. For example, social class could be grouped and ordered as lower class, working class, middle class, and upper class. Items (groupings) on this kind of scale are not equally spaced.
A scale on which numbers are used only to place objects in order.