What is the meaning of Tightener?

(n.) That which tightens; specifically (Mach.), a tightening pulley.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). tightener. Retrieved September 20, 2026, from http://smartdefine.org/tightener/definitions/2072644
ChicagoWebster's. 2011. "tightener" http://smartdefine.org/tightener/definitions/2072644 (accessed September 20, 2026).
HarvardWebster's 2011, tightener, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/tightener/definitions/2072644>.
MLAWebster's. "tightener" 28 May 2011. Web. 20 September 2026. <http://smartdefine.org/tightener/definitions/2072644>