noun
A pawl, click, or detent for holding or propelling a ratchet wheel, or ratch, etc.
A mechanism composed of a ratchet wheel, or ratch and pawl.
A ratchet wrench.
(by extension) A procedure or regulation that goes in one direction, usually up.
(cryptography) A mechanism for generating a new unique key for each message by moving forward in a sequence.
A noisemaker or musical instrument where sound is generated by a board striking against a rotating gear.
(finance) Ellipsis of full ratchet.
verb
(intransitive) To increment or decrement; especially, to offer controlled motion that can increment while resisting decrement, or vice versa.
(transitive) To cause (something) to become incremented or decremented.
adjective
(US, slang, derogatory) Ghetto; unseemly, indecorous.
noun
(US, slang, derogatory) A person, usually a female, who acts or behaves in a ghetto, unseemly, or indecorous way or manner.