Pronunciation: (im-pul'shun), [key]
1. the act of impelling, driving onward, or pushing.
2. the resulting state or effect; impulse; impetus.
3. the inciting influence of some feeling or motive; mental impulse.
4. a constraining or inciting action exerted on the mind or conduct: divine impulsion.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.