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  1. Dictionary
    main·spring
    /ˈmānˌspriNG/

    noun

    • 1. something that plays a principal part in motivating or maintaining a movement, process, or activity: "innovation is the mainspring of the new economy"
    • 2. the principal spring in a watch, clock, or other mechanism.

    More definitions, origin and scrabble points

  2. Mainspring is a noun that means the most important reason for something or the thing that makes something else happen. Learn how to use it in sentences and see synonyms and translations.

    • English (US)

      MAINSPRING meaning: 1. the most important reason for...

  3. The meaning of MAINSPRING is the chief spring in a mechanism especially of a watch or clock. How to use mainspring in a sentence.

  4. MAINSPRING meaning: 1. the most important reason for something; the thing that makes something else happen: 2. the…. Learn more.

  5. Mainspring is a noun that means the principal spring in a mechanism, such as a watch or clock, or the chief cause or motive of something. Learn more about its synonyms, pronunciation, and usage with examples from Collins English Dictionary.

  6. Mainspring is a noun that means the most important part or influence of something, or the spring in a watch or clock. Learn how to use it in sentences and see synonyms and pronunciation.

  7. Mainspring definition: the principal spring in a mechanism, as in a watch.. See examples of MAINSPRING used in a sentence.

  8. noun. the most important spring in a mechanical device (especially a clock or watch); as it uncoils it drives the mechanism. see more.