(n): a change for the better; progress in development
(n): the act of making something different (as e.g. the size of a garment)
(n): the action of changing something
(n): the act of adjusting something to match a standard
(n): the act of checking or adjusting (by comparison with a standard) the accuracy of a measuring instrument
(n): the process of adapting to something (such as environmental conditions)
(n): a process occurring in living organisms
(n): an amount added or deducted on the basis of qualifying circumstances
(n): payment or reward (as for service rendered)