Impulse

im′puls, n. the act of impelling: effect of an impelling force: force suddenly communicated: influence on the mind.— n. Impul′sion , impelling force: instigation.— adj. Impuls′ive , having the power of impelling: actuated by mental impulse: ( mech. ) acting by impulse: not continuous.— adv. Impuls′ively .— n. Impuls′ivene . [L. impulsus , pre ure— impellĕre .]