Im*pul"sion (?), n. [L.
impulsio: cf. F. impulsion. See Impel.]
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.