Im-pŭl'sion, n.

(im-pŭl'shun), n. [Fr. & Sp. impulsion, It. impulsione, Pr. & Lat. impulsio. See IM-PEL.]

1. The act of impelling or driving onward; the sudden or momentary agency of a body in motion on another body.
2. Influence acting unexpectedly or temporarily on the mind, from without or within; sudden motion or influence; impulse.

Thou didst plead Divine impulsion prompting. Milton.