conversion - the act of changing from one use or function or purpose to another

alteration, change, modification - an event that occurs when something passes from one state or phase to another; "the change was intended to increase sales"; "this storm is certainly a change for the worse"; "the neighborhood had undergone few modifications since his last visit years ago"

betterment, improvement, advance - a change for the better; progress in development

population shift - a change in the relative numbers of the different groups of individuals making up a population

pyrolysis - transformation of a substance produced by the action of heat

sea change - a profound transformation

sublimation - (chemistry) a change directly from the solid to the gaseous state without becoming liquid

tin disease, tin pest, tin plague - the transformation of ordinary white tin into powdery gray tin a very cold temperatures

changeover, conversion, transition - an event that results in a transformation

retrogression, degeneration - passing from a more complex to a simpler biological form

strengthening - becoming stronger

weakening - becoming weaker

natural philosophy, physical science, physics - the science of matter and energy and their interactions

alteration, change, modification - an event that occurs when something passes from one state or phase to another; "the change was intended to increase sales"; "this storm is certainly a change for the worse"; "the neighborhood had undergone few modifications since his last visit years ago"