1. The act of impelling or driving onward, or the state of being
impelled; the sudden or momentary agency of a body in motion on another
body; also, the impelling force, or impulse. "The impulsion of the
air." Bacon.
2. Influence acting unexpectedly or temporarily on the mind; sudden
motive or influence; impulse. "The impulsion of conscience." Clarendon.
"Divine impulsion prompting." Milton.