Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Latin
Origin: impetere 'to attack', from petere 'to go to, look for'

impetus

noun
     
Related topics: Physics
im‧pe‧tus [uncountable]
1 an influence that makes something happen or makes it happen more quickly
impetus for
The report may provide further impetus for reform.
The discovery gave fresh impetus to the research.
2 technical the force that makes an object start moving, or keeps it moving

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary