Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “unsustainable”


adjective     /ˌʌnsəˈsteɪnəbəl/
that cannot continue at the same rate : They are suffering a serious increase in inflation and an unsustainable boom in house prices .unsustainable level/pace/rate Public borrowing had reached an unsustainable level of 8% of GDP .unsustainable debt/deficit The economy is running an unsustainable deficit , making tax increases inevitable .
NATURAL RESOURCES causing damage to the environment by using more of something than can be replaced naturally : Unsustainable logging of commercial forests is threatening the industry's survival beyond 10-15 years . In March , 50,000 people took to the streets of Mallorca to protest the island's unsustainable development .
(Definition of unsustainable adjective from the Cambridge Business English Dictionary © Cambridge University Press)
Focus on the pronunciation of unsustainable

Browse related topics

You are looking at an entry to do with Unachievable, but you might be interested in these topics from the Chance and possibility topic area:

More Business English definitions for “unsustainable”

Definitions of “unsustainable” in other dictionaries

Word of the Day


a situation in which two people are friends

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More