WordReference Random House Unabridged Dictionary of American English © 2026
pre•vent•er
(pri ven′tər),USA pronunciation n.
- a person or thing that prevents.
- [Naut.]
- Naval Termsany of various lines set up to reinforce or relieve ordinary running or standing rigging.
- Naval Termsa line for preventing a sail from jibbing.
- prevent + -er1 1580–90