Simple Definition of mainspring
: the most important spring in a watch or clock
: the most important or powerful cause or part of something
Full Definition of mainspring
1 : the chief spring in a mechanism especially of a watch or clock
2 : the chief or most powerful motive, agent, or cause
Examples of mainspring
Agriculture is the mainspring of their economy.
First Known Use of mainspring
Rhymes with mainspring
Anqing, backswing, Baoding, bedspring, Beijing, bi-swing, bitewing, bowstring, bullring, Chongqing, clearwing, downswing, drawstring, D ring, earring, first-string, forewing, G-string, greenwing, growth ring, hairspring, hamstring, handspring, headspring, heartstring, hind wing, hot spring, Kunming, lacewing, lapwing, latchstring, left-wing, Nanjing, Nan Ling, Nanning, O-ring, offspring, plaything, redwing, right-wing, seal ring, shoestring, slip ring, sure thing, unsling, unstring, upspring, upswing, waxwing, wellspring, whitewing, wingding, Xining
MAINSPRING Defined for Kids
Definition of mainspring
: the principal spring in a mechanical device (as a watch or clock)
Learn More about mainspring
Britannica.com: Encyclopedia article about "mainspring"
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