back shaft

noun

Definition of back shaft

1 : a countershaft driven by a back gear
2 : any shaft placed at the back of a machine

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!

First Known Use of back shaft

1847, in the meaning defined at sense 1

Keep scrolling for more

Learn More about back shaft

Time Traveler for back shaft

Time Traveler

The first known use of back shaft was in 1847

See more words from the same year

Statistics for back shaft

Cite this Entry

“Back shaft.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/back%20shaft. Accessed 12 December 2019.

Comments on back shaft

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

WORD OF THE DAY

a period of high artistic development

Get Word of the Day daily email!

Test Your Vocabulary

Semantic Drift Quiz

  • a twisty river
  • Which of the following was once a synonym for fun?
Spell It

Can you spell these 10 commonly misspelled words?

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!