based
Americanadjective
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having a specified object or material as its base or foundation or as its primary constituent (often used in combination).
Our house was one of the three stone-based houses of that era, built by my maternal grandfather.
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established, grounded, or focused on a specified principle or belief, fact, method, etc. (often used in combination).
It’s a culturally based phys ed curriculum that uses Indian traditions and values to teach healthy lifestyle habits.
There are a number of promising evidence-based treatment modalities to address depression.
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having a specified place as its primary location or headquarters; stationed or situated (often used in combination).
A centrally based Houston media agency is looking for a Digital Account Manager to help with a key communications client.
The Chicago-based HIV/AIDS organization provides housing, healthcare, and substance abuse programs for its clients.
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having a specified origin or source (often used in combination).
They want to replace animal-based foods with plant-based milks and vegetable protein.
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Slang. true to one’s self or secure in one’s beliefs regardless of what others think, especially when those beliefs fall outside of the mainstream.
Her presentation was so based—did you see the teacher's expression? Priceless!
interjection
verb
Other Word Forms
Etymology
Origin of based
First recorded in 1610–20; base 1 ( def. ) + -ed 2 ( def. )
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.
Treatment is supportive and based on symptoms, such as hospital care and respiratory support.
From BBC • May 7, 2026
At the time, its worth was based on SpaceX’s dominant launch franchise, which handles more than half of the world’s orbital launches, and the Starlink space-based broadband product, with more than 10 million subscribers.
From Barron's • May 7, 2026
The SEC plans to weigh revising auditor independence rules over the next year, starting with releasing informal, nonbinding guidance based on companies’ recurring questions, Chief Accountant Kurt Hohl said backstage at a conference Thursday.
From The Wall Street Journal • May 7, 2026
Freedman described the remaining Section 47.1 dispute as “a pending request for fees based on a very narrow issue that has been with the court since September 2025.”
From Los Angeles Times • May 7, 2026
This female coyote came into the care of the Department based on her being discovered in the park after hiding for several weeks in an underground cave.
From "Wayward Creatures" by Dayna Lorentz
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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.