impulse

US /ˈɪmˌpʌls/

UK /'ɪmpʌls/

B1TOEIC
n.NounSudden desire to do something that is not planned
I went to see an old friend on an impulse
n.NounA brief electrical signal transmitted along a nerve fiber or muscle fiber
The nerve impulse travels along the axon.
n.NounThe integral of a force over the time interval for which it acts
The impulse is equal to the change in momentum.
n.NounA motivating force; an impetus.
The desire for justice was the main impulse behind his actions.
n.NounA brief surge of electrical current.
The circuit sends an impulse to the motor.
n.NounA wave of excitation transmitted through nerve fibers and neurons.
Nerve impulses travel along the nerve fibers.

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