plumb rule

noun

Definition of plumb rule 

: a narrow board with a plumb line and bob used especially by builders and carpenters

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!

History and Etymology for plumb rule

Middle English plomrewle, from plom, plum, plumbe, noun, plumb + rewle, reule rule

Keep scrolling for more

Learn More about plumb rule

Share plumb rule

Statistics for plumb rule

Look-up Popularity

Comments on plumb rule

What made you want to look up plumb rule? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a magnificent or impressive array

Get Word of the Day daily email!

Test Your Vocabulary

Name that Food Quiz

How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

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