unstructured

adjective

un·​struc·​tured ˌən-ˈstrək-chərd 

: lacking structure or organization: such as

a

: not formally organized in a set or conventional pattern

an unstructured question

feel insecure in an unstructured situation

b

: not having a system or hierarchy typical of an organized society

Synonyms of unstructured

• chaotic
• amorphous
• shapeless
• formless
• unformed
• unshaped

Examples of unstructured in a Sentence

Unstructured play time is important for children.

Her life is very unstructured.

Recent Examples on the Web

The robot also combines global path planning with local foot placement optimization, ensuring precise navigation through unstructured terrain and dynamic obstacles. —Jijo Malayil, Interesting Engineering, 21 Apr. 2026

The hall widens at several points to encourage informal gatherings, and a small lounge at the front offers opportunities for unstructured fun. —Edward Keegan, Chicago Tribune, 19 Apr. 2026

It’s been neat to have more time and sometimes to have days that are so unstructured. —Helen Carefoot, Flow Space, 8 Apr. 2026

The robots are capable of navigating stairs, stabilizing under pressure, and operating in unstructured environments that earlier industrial robots couldn’t handle. —Catherina Gioino, Fortune, 6 Apr. 2026

Word History

First Known Use

1936, in the meaning defined above

Medical Definition

unstructured

adjective

un·​struc·​tured ˌən-ˈstrək-chərd 

: lacking structure : not formally organized

unstructured psychological tests