back vent

noun

Definition of back vent 

: a ventilating pipe attached to a waste pipe on the sewer side of its trap to prevent siphonage

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!

Other Words from back vent

back venting noun

First Known Use of back vent

1915, in the meaning defined above

Keep scrolling for more

Learn More about back vent

Statistics for back vent

Look-up Popularity

Time Traveler for back vent

The first known use of back vent was in 1915

See more words from the same year

Comments on back vent

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

WORD OF THE DAY

noxious or harmful

Get Word of the Day daily email!

Test Your Vocabulary

A Thanksgiving Word Quiz

  • a-traditional-thanksgiving-dinner
  • November comes from a word for which of the following numbers?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

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!