Definition of regress
(Entry 1 of 2)
1a
: an act or the privilege of going or coming back
b
: reentry sense 1
2
: movement backward to a previous and especially worse or more primitive state or condition
3
: the act of reasoning backward
regress
verb
regressed; regressing; regresses
Definition of regress (Entry 2 of 2)
1a
: to make or undergo regress : retrograde
b
: to be subject to or exhibit regression
2
: to tend to approach or revert to a mean
: to induce a state of psychological regression in
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Merriam-Webster unabridged
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Time Traveler for regress
The first known use of regress was in the 15th century
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