impulse

1 ENTRIES FOUND:
impulse /ˈɪmˌpʌls/ noun
plural impulses
impulse
/ˈɪmˌpʌls/
noun
plural impulses
Britannica Dictionary definition of IMPULSE
[count]
1 
: a sudden strong desire to do something
— often followed by to + verb
◊ To do something on (an) impulse or on a sudden impulse is to do it suddenly and without thinking about it first.
◊ An impulse buy/purchase is something that is bought on impulse and that usually is not really needed.
◊ Impulse buying is the act or practice of buying things on impulse.
2 
technical : a small amount of energy that moves from one area to another