Dictionary.com
Thesaurus.com
Synonyms

unwritten

American  
[uhn-rit-n] / ʌnˈrɪt n /

adjective

  1. not actually formulated or expressed; customary; traditional.

    Synonyms:
    inferred, tacit, understood, implicit
  2. not written; not put in writing or print; oral.

    an unwritten agreement.

  3. containing no writing; blank.


unwritten British  
/ ʌnˈrɪtən /

adjective

  1. not printed or in writing

  2. effective only through custom; traditional

  3. without writing upon it

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of unwritten

First recorded in 1325–75; Middle English unwriten; see un- 1, written

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“Smoglandia” is a great California yarn, and one with the ending still unwritten.

From Los Angeles Times • Mar. 26, 2026

The High North has long been shielded by the concept of "Arctic exceptionalism" -- the notion that the region had its own set of unwritten rules of cooperation which were immune to geopolitical rivalries.

From Barron's • Mar. 13, 2026

Finding what’s unwritten, tricks of the trade, and the view of the constantly changing competitive landscape will create new winners.

From The Wall Street Journal • Mar. 1, 2026

It might also help to ask your colleagues if there is an unwritten dress code.

From MarketWatch • Feb. 28, 2026

It was an unwritten rule that the seat you chose the first day became your assignment—unless you were so unruly that Mrs. Korshak made you change.

From "The View From Saturday" by E.L. Konigsburg