Pronunciation: (im'pi-tus), Strict Standards: Non-static method FenSites::linkTo() should not be called statically in /site/html/dictionary/impetus.html on line 73 [key]
1. a moving force; impulse; stimulus: The grant for building the opera house gave impetus to the city's cultural life.
2. (broadly) the momentum of a moving body, esp. with reference to the cause of motion.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.