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

math, mathematics, maths - a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement

function, mathematical function - a mathematical relation such that each element of one set is associated with at least one element of another set

reflection - (mathematics) a transformation in which the direction of one axis is reversed

rotation - (mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin

translation - (mathematics) a transformation in which the origin of the coordinate system is moved to another position but the direction of each axis remains the same

affine transformation - (mathematics) a transformation that is a combination of single transformations such as translation or rotation or reflection on an axis

grammatical rule, rule of grammar - a linguistic rule for the syntax of grammatical utterances

change of integrity - the act of changing the unity or wholeness of something

genetic science, genetics - the branch of biology that studies heredity and variation in organisms

change of integrity - the act of changing the unity or wholeness of something

permutation - complete change in character or condition; "the permutations...taking place in the physical world"- Henry Miller

revision, alteration - the act of revising or altering (involving reconsideration and modification); "it would require a drastic revision of his opinion"

transfiguration - the act of transforming so as to exalt or glorify

transmogrification - the act of changing into a different form or appearance (especially a fantastic or grotesque one); "the transmogrification of the prince into a porcupine"

metamorphosis - a complete change of physical form or substance especially as by magic or witchcraft