#1 regress n. [reasoning backward] the reasoning involved when you assume the conclusion is true and reason backward to the evidence. wn
#2 regress v. go back to a statistical means. wn
#3 regress n. [regression, reversion, retrogression, retroversion] returning to a former state. wn
#4 regress v. [revert, return, retrovert, turn back] go back to a previous state; "We reverted to the old rules". wn
#5 regress v. [retrograde, retrogress] get worse or fall back to a previous condition. wn
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