change the action of changing something; "the change of government had no impact on the economy"; "his change on abortion cost him the election"
reduction -
any process in which electrons are added to an atom or ion (as by removing oxygen or adding hydrogen); always occurs accompanied by oxidation of the reducing agent
chemical reaction,
reaction (chemistry) a process in which one or more substances are changed into others; "there was a chemical reaction of the lime with the ground water"
reduction -
the act of decreasing or reducing something
alleviation,
easement,
easing,
relief (law) the privilege of using something that is not your own (as using another's land as a right of way to your own land)
de-escalation (war) a reduction in intensity (of a crisis or a war)
minimisation,
minimization the act of reducing something to the least possible amount or degree or position
depletion the act of decreasing something markedly
shortening act of decreasing in length; "the dress needs shortening"