n. [ L. impulsio: cf. F. impulsion. See Impel. ] [ 1913 Webster ]
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. [ 1913 Webster ]
2. Influence acting unexpectedly or temporarily on the mind; sudden motive or influence; impulse. “The impulsion of conscience.” Clarendon. “Divine impulsion prompting.” Milton. [ 1913 Webster ]