Apedia

Impulse  A  A  Countable  Or  Uncountable  Strong   To

Front

impulse

Back 1 [countable, uncountable] a 
sudden
https://www.ldoceonline.com/dictionary/sudden
 strong 
desire
https://www.ldoceonline.com/dictionary/desire
 to do something without thinking about whether it is a 
sensible
https://www.ldoceonline.com/dictionary/sensible
 thing to do
 SYN urge

impulse to do something 
a sudden impulse to laugh
 

Marge’s first impulse was to run.

on impulse 
On impulse, I picked up the phone and rang her.
 

Most beginners buy plants on impulse and then hope for the best.

2 [countable] technical a short 
electrical
https://www.ldoceonline.com/dictionary/electrical
 
signal
https://www.ldoceonline.com/dictionary/signal
 that 
travels
https://www.ldoceonline.com/dictionary/travel
 in one 
direction
https://www.ldoceonline.com/dictionary/direction
 along a 
nerve
https://www.ldoceonline.com/dictionary/nerve
 or 
wire
https://www.ldoceonline.com/dictionary/wire
 
The eye converts light signals to nerve impulses.

3 [countable] a 
reason
https://www.ldoceonline.com/dictionary/reason
 or 
aim
https://www.ldoceonline.com/dictionary/aim
 that causes a particular kind of activity or 
behaviour
https://www.ldoceonline.com/dictionary/behaviour

 It is the passions which provide the main impulse of music.

Tags: essentials

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