builder's jack


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

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Learn More About builder's jack

Dictionary Entries Near builder's jack

builder's iron

builder's jack

builder's knot

See More Nearby Entries 

Statistics for builder's jack

Cite this Entry

“Builder's jack.” Dictionary, Merriam-Webster, Accessed 1 Dec. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!