a person or thing that prevents.
  1. any of various lines set up to reinforce or relieve ordinary running or standing rigging.
  2. a line for preventing a sail from jibbing.

Origin of preventer

First recorded in 1580–90; prevent + -er1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for preventer

Historical Examples of preventer

  • A ship hove-to with preventer tackles on the rudder-head is unmanageable.

  • Preventer—A rope used to prevent the straining or breaking of a spar or sail.

    On Yacht Sailing

    Thomas Fleming Day

  • Preventer stays: Additional ropes set up taut to prevent spars carrying away when a vessel is under a press of canvas.

  • The only safeguard lies in rigging a preventer stay that will set up with a tackle, the fall leading inboard.

  • It was formerly a custom to fit two bobstays, a regular one and a smaller one, called a preventer.

British Dictionary definitions for preventer



a person or thing that prevents
nautical a rope or other piece of gear rigged to prevent a sail from gybing
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012