transitive verb
un·​prison | \"+\

Definition of unprison 

: to free from prison

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 unprison

14th century, in the meaning defined above

History and Etymology for unprison

Middle English, from un- entry 2 + prison

Keep scrolling for more

Learn More about unprison

Statistics for unprison

Look-up Popularity

Time Traveler for unprison

The first known use of unprison was in the 14th century

See more words from the same century

Comments on unprison

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


something that serves to warn or remind

Get Word of the Day daily email!

Test Your Vocabulary

Autumn Words of the Day 2018

  • a-top-down-image-of-road-through-an-autumn-forest
  • Which is a synonym of fugacious?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

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!