underdeveloped

American  

[uhn-der-di-vel-uhpt] / ˌʌn dər dɪˈvɛl əpt /

adjective

1. improperly or insufficiently developed.

2. Photography. (of a negative) less developed than is normal, so as to produce a relatively dark positive lacking in contrast.

3. developing.

---

underdeveloped British  

/ ˌʌndədɪˈvɛləpt /

adjective

1. immature or undersized

2. relating to societies in which both the surplus capital and the social organization necessary to advance are lacking

3. photog (of a film, plate, or print) processed in developer for less than the required time, thus lacking in contrast

---

Etymology

Origin of underdeveloped

First recorded in 1890–95; under- + develop + -ed ²

Example Sentences

See Examples For:

underdeveloped

For underdeveloped Laos, the new joint facility offers military training and equipment, financial incentives and even stronger ties with Beijing, analysts say.

From Barron's ● Oct. 2, 2026

In her social media plea at the time, Phillips said she was born with an underdeveloped kidney.

From Los Angeles Times ● Jul. 8, 2026

It only takes one attention-grabbing and theologically underdeveloped topic for these competing incentives to create drama.

From Slate ● Jun. 8, 2026

“There are several aspects of the revised application that are unclear or underdeveloped and require supplementation,” the board said.

From The Wall Street Journal ● May 28, 2026

And what force would be stronger than me and my admittedly underdeveloped upper- body muscles wailing on the trunk with random tools?

From "Miss Peregrine's Home for Peculiar Children" by Ransom Riggs

Related Words

• embryonic
• nascent
• undeveloped