builder's jack

noun

Definition of builder's jack

1a : a bracket that rests on a windowsill and projects outside for a worker to stand or sit upon in repairing a window
b : a bracket fastened to a wall to support a scaffold
2 : a jack (as a jackscrew) used by builders

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Cite this Entry

“Builder's jack.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/builder%27s%20jack. Accessed 1 Dec. 2021.

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