Definitions:

1. A tool or device that allows continuous linear or rotary motion in one direction while preventing motion in the opposite direction. NOUN
   • The mechanic used a rachet to tighten the bolts.
2. Refers to someone or something that is uncouth, loud, or behaving in a way considered wild or improper. NOUN
   • Her friends joked about how she acted a little rachet at the party.

Synonyms:

• ratchet