from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. work done in addition to one's normal duties

from the GNU version of the Collaborative International Dictionary of English

  • n. Work aside from regular work; subordinate or secondary business.

from The Century Dictionary and Cyclopedia

  • n. Work done at odd times or in addition to one's regular work; an occasional task or performance.
  • n. A work that has failed in the doing; a work that has proved a failure.


From by- +‎ work. (Wiktionary)


  • For naval service is a matter of art, like anything else; and does not admit of being practised just when it may happen, as a bywork; but rather does not even allow of anything else being a bywork to it.

    I. In Favor of the Peloponnesian War


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