noun ratch·et \ˈra-chət\

: a device made up of a wheel or bar with many teeth along its edge in between which a piece fits so that the wheel or bar can move only in one direction

Full Definition of RATCHET

:  a mechanism that consists of a bar or wheel having inclined teeth into which a pawl drops so that motion can be imparted to the wheel or bar, governed, or prevented and that is used in a hand tool (as a wrench or screwdriver) to allow effective motion in one direction only
:  a pawl or detent for holding or propelling a toothed wheel

Variants of RATCHET

ratch·et also rach·et \ˈra-chət\

Origin of RATCHET

alteration of earlier rochet, from French, alteration of Middle French rocquet ratchet, bobbin, of Germanic origin; akin to Old High German rocko distaff — more at rock
First Known Use: 1654

Other Mechanical Engineering Terms

centrifuge, differential, flange, lathe, linchpin, pinion, plenum, traction

Rhymes with RATCHET



: to increase or decrease (something) especially by a series of small steps or amounts

Full Definition of RATCHET

transitive verb
:  to cause to move by steps or degrees —usually used with up or down <tried to ratchet down the debt>
intransitive verb
:  to proceed by steps or degrees

Variants of RATCHET

ratchet also rachet

First Known Use of RATCHET



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