mainspring

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noun main·spring \ˈmān-ˌspriŋ\

Definition of mainspring

  1. 1 :  the chief spring in a mechanism especially of a watch or clock

  2. 2 :  the chief or most powerful motive, agent, or cause

Examples of mainspring in a sentence

  1. Agriculture is the mainspring of their economy.

1591

First Known Use of mainspring

1591


MAINSPRING Defined for English Language Learners

mainspring

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noun main·spring \ˈmān-ˌspriŋ\

Definition of mainspring for English Language Learners

  • : the most important spring in a watch or clock

  • : the most important or powerful cause or part of something


MAINSPRING Defined for Kids

mainspring

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noun main·spring \ˈmān-ˌspriŋ\

Definition of mainspring for Students

  1. :  the principal spring in a mechanical device (as a watch or clock)


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