undevelopt

Adjective

undeveloped (not comparable)

1. Not developed or used.
   • These developments, most of which have taken place during the past 30 years, are remarkable in view of the low traffic density, except in the neighbourhood of Oslo, and the very extensive undeveloped areas of mountain and virgin forest.1952 January, “Electrification Progress in Norway”, in Railway Magazine, page 54

   Synonyms:

   primitive, rudimentary, unrefined, crude, garagelike, rough, rude, rudimental

   Antonyms:

   developed, refined, sophisticated

2. not built on, unbuilt; not ready for building on
   • The message from the authorities is straightforward: undeveloped land within city boundaries should no longer be treated as a passive investment, it must be used productively.2025 December 26, “Saudi Arabia introduces new White Land Rules, imposes fines up to 100% on undeveloped plots”, in Times of India

   Synonyms:

   empty, vacant

   Antonyms:

   built-up, developed

3. lagging behind others, especially in economic or social matters
   • Running as full of enthusiasm as they can, some undeveloped countries are falling farther behind—their needs are growing faster than their achievements.1958 May, Stevan Dedijer, “The Birth and Death of a Myth”, in Bulletin of the Atomic Scientists, volume 14, number 5, page 164

   Synonyms:

   developing, third-world

   Antonyms:

   advanced, developed