Longman Dictionary of Contemporary English homepage

Topic: CHRONOLOGY

mainspring

 noun
     
main‧spring [countable]
1

the mainspring of something

the most important reason or influence that makes something happen:
Christian faith was the mainspring of Peter's life.
Small companies are the mainspring of the British economy.
2TMC the most important spring in a watch or clock
Definition of mainspring from the Longman Dictionary of Contemporary English within
the topic CHRONOLOGY
Word of the Day
The CHRONOLOGY
Word of the Day is:
PDT

Other related topics