undefined

adjective

un·​de·​fined ˌən-di-ˈfīnd 

: not defined: such as

a

: not clearly or precisely shown, described, or limited

undefined rules

undefined powers

a vague, undefined feeling of dread

… the true outlines of Clinton's foreign policy remain undefined.

—William Greider

b

: not provided with a definition

an undefined dictionary entry

Synonyms

• blear
• bleary
• blurry
• dim
• faint
• foggy
• fuzzy
• gauzy
• hazy
• indefinite
• indistinct
• indistinguishable
• misty
• murky
• nebulous
• obscure
• opaque
• pale
• shadowy
• unclear
• undetermined
• vague

Examples of undefined in a Sentence

plagued by undefined worries that kept her awake at night

Recent Examples on the Web

Then there was the undefined femininity of baby doll dresses with a t-shirt underneath or cropped cardigans with pleated skirts—think Cher Horowitz in Clueless or Kelly Taylor in Beverly Hills, 90210. —Lauren Brown West-Rosenthal, Parents, 15 June 2024

There is no need for memory to grow or shrink in undefined ways, for recursion, or anything like that. —Benj Edwards, Ars Technica, 3 May 2024

And even if China has reached some undefined upper limit of its power, influence, or economic growth, Chinese and American leaders probably would not realize it until years later. —Evan S. Medeiros, Foreign Affairs, 24 Apr. 2024

The exact date of this night is undefined but is believed to fall during an odd-numbered night. —Mariyam Muhammad, The Enquirer, 28 Mar. 2024

Word History

First Known Use

1611, in the meaning defined above