A suddenly reversed or backward motion, such as of a rope or elastic band when it snaps under tension.
A negative reaction, objection or outcry, especially of a violent or abrupt nature.
The public backlash to the proposal was quick and insistent.
The looseness through which one part of connected machinery, such as a wheel, gear, piston, or screw, can be moved without moving the connected parts, or a measurement of the distance moved thereby; either intentional (as allowance) or unintentional (from error or wear).
... the word "backlash" is used in the extended sense in which it is understood in Lancashire and Yorkshire , including not only backlash proper , but also break of contact between the working faces of the teeth of the two wheels when the driven wheel overruns the driver without actual backlash . To place rope or belt drums of any considerable size upon shafts driven by spur gearing is nearly always dangerous.
To perform a backlash, to lash back in reaction to some cause.
From back- + lash.
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