Definition of back-reef

: consisting of or belonging to a restricted lagoon behind barrier reefs a back-reef area back-reef geologic formations

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-reef

1944, in the meaning defined above

History and Etymology for back-reef

back reef

Keep scrolling for more

Learn More about back-reef

Time Traveler for back-reef

Time Traveler

The first known use of back-reef was in 1944

See more words from the same year

Statistics for back-reef

Cite this Entry

“Back-reef.” Dictionary, Merriam-Webster, Accessed 9 Jul. 2020.

Comments on back-reef

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


See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

A More Exception(al) Quiz

  • hot dog  hot dog  hot dog  hot dog cat
  • Which of the following words is not a synonym for ‘a young person’?
Spell It

Can you spell these 10 commonly misspelled words?

Bee Cubed

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

Love words? Need even more definitions?

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