ratchet

1. n. A pawl, click, or detent, for holding or propelling a ratchet wheel, or ratch, etc. Source: opted

2. n. A mechanism composed of a ratchet wheel, or ratch, and pawl. See Ratchet wheel, below, and 2d Ratch. Source: opted

3. n. mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction Source: wordnet

4. v. move by degrees in one direction only Source: wordnet

5. 1. A pawl, click, or detent, for holding or propelling a ratchet wheel, or ratch, etc. 2. A mechanism composed of a ratchet wheel, or ratch, and pawl. See Ratchet wheel, below, and 2d Ratch. Ratchet brace (Mech.), a boring brace, having a ratchet wheel and pawl for rotating the tool by back and forth movements of the brace handle. -- Ratchet drill, a portable machine for working a drill by hand, consisting of a hand lever carrying at one end a drill holder which is revolved by means of a ratchet wheel and pawl, by swinging the lever back and forth. -- Ratchet wheel (Mach.), a circular wheel having teeth, usually angular, with which a reciprocating pawl engages to turn the wheel forward, or a stationary pawl to hold it from turning backward. Note: In the cut, the moving pawl c slides over the teeth in one direction, but in returning, draws the wheel with it, while the pawl d prevents it from turning in the contrary direction. Source: webster

6. n:40/v:60 n. mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction v. move by degrees in one direction only Source: ecdict

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