- 1A device consisting of a bar or wheel with a set of angled teeth in which a pawl, cog, or tooth engages, allowing motion in one direction only.More example sentences
- A ratchet is a mechanical device that restricts movement in one direction and allows movement in the opposite direction.
- I like this position as it means that, if required, you can easily engage or disengage the ratchet with the hand that is holding the rod while playing a fish.
- Unlike using a ratchet, which allows for only a series of preset pitches, to hold the blades in position, the cam can grip anywhere along the guide are, allowing for very fine adjustments.
- 1.1A bar or wheel that forms part of a ratchet.More example sentences
- The drive mechanism may comprise a ratchet and pawl.
- The device was designed and built by chemists at the Universities of Edinburgh and Bologna, and it is the hydrogen bonds that act as locking teeth on a molecular ratchet, controlling the movements of the wheels.
- In the same area is the lever that engages the ratchet to rotate the cylinder.
- 2A situation or process that is perceived to be deteriorating or changing steadily in a series of irreversible steps: a one-way ratchet of expanding entitlementsMore example sentences
- In three major towns in Antrim, the sectarian ratchet is being turned up.
- That would have given each worker a stake of £100,000 or more, based on the equity ratchet, and a real incentive to drive forward shareholder value.
- The international and domestic prestige that can be derived from space achievements can best be understood as a series of ratchets on a downward slope.
verb (ratchets, ratcheting, ratcheted)[with object] Back to top
- 1Operate by means of a ratchet.More example sentences
- The researchers aimed to use the brake to ratchet the propeller in only one direction, by executing a series of chemical reactions between blade and brake.
- Somewhere a Dumpster is ratcheted open by the claws of a black machine.
- Quickly repeating these jaw movements, the threadsnake ratchets the squirmy prey farther and farther down the hatch.
- 2 (ratchet something up/down) Cause something to rise (or fall) as a step in what is perceived as a steady and irreversible process: the Bank of Japan ratcheted up interest rates againMore example sentences
- The last battle, in particular, really ratchets up the tension.
- But as the vice president ratchets up his attacks on John Kerry, questions are raised about Cheney himself and his role in a campaign that is coming more into focus.
- The tension ratchets upwards a notch in each successive movement.
mid 17th century: from French rochet, originally denoting a blunt lance head, later in the sense 'bobbin, ratchet'; related to the base of archaic rock 'quantity of wool on a distaff for spinning'.
More definitions of ratchetDefinition of ratchet in:
- The British & World English dictionary