/im pul"sheuhn/ , n.
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.
[ 1400-50; late ME impulsion- (s. of impulsio ) incitement. See IMPULSE, -ION ]