sustainable
Americanadjective
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capable of being supported or upheld, as by having its weight borne from below.
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pertaining to a system that maintains its own viability by using techniques that allow for continual reuse.
sustainable agriculture. Aquaculture is a sustainable alternative to overfishing.
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able to be maintained or kept going, as an action or process.
a sustainable negotiation between the two countries.
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able to be confirmed or upheld.
a sustainable decision.
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able to be supported as with the basic necessities or sufficient funds.
a sustainable life.
adjective
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capable of being sustained
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(of economic development, energy sources, etc) capable of being maintained at a steady level without exhausting natural resources or causing severe ecological damage
sustainable development
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(of economic growth) non-inflationary
Other Word Forms
Etymology
Origin of sustainable
Explanation
If something is sustainable, then it can be maintained or continued. A 5-minute mile pace probably isn't sustainable for anyone other than Olympic marathon runners. These days this adjective is often used to describe something that has a low long-term effect on the environment, like "sustainable agriculture" — a method of farming that doesn’t ravage the land, deplete resources permanently, or produce a great deal of pollution. Break down the word into two parts: sustain and able, to visualize and remember that you're able to sustain something sustainable.
Vocabulary lists containing sustainable
Essential Academic Vocabulary for High School Students, List 4
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ACT Vocabulary List
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Human Geography - Middle School
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Quadir thought Valeant’s business model—borrowing to acquire other pharma companies and then raising the prices of their drugs—wasn’t sustainable.
From The Wall Street Journal ● Jul. 18, 2026
"I would like for people to have lifelong careers that are sustainable, and I want to experience the art made by those folks."
From BBC ● Jul. 15, 2026
“As Freddy’s continues to grow, we remain focused on supporting our franchisees through new restaurant prototypes, greater real estate flexibility, and development strategies that help position the brand for sustainable growth.”
From Los Angeles Times ● Jul. 15, 2026
While valuations in the space are high relative to history, they offer investors nervous about the semiconductor trade a more sustainable betting option on AI, he said.
From MarketWatch ● Jul. 15, 2026
They’re named Alicia and Lyon, and Lyon keeps using words like repurposed and sustainable.
From "Leah on the Offbeat" by Becky Albertalli
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
