Dictionary
pre•vent•er
Pronunciation: (pri-ven'tur), [key]—
n.
1. a person or thing that prevents.
2. Naut.
a. any of various lines set up to reinforce or relieve ordinary running or standing rigging.
b. a line for preventing a sail from jibbing.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.