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.
Allbirds, another once-popular apparel retailer based in San Francisco, announced last month it was shifting its focus from sneakers to AI chips.
From Los Angeles Times • May 19, 2026
Very little of the communication between Chopra and Epstein, based on the evidence in the released FBI files, was about sleep.
From Salon • May 19, 2026
Their relationship "was based on mutual consent, care and affection", he said.
From BBC • May 19, 2026
By comparison, Sunrun RUN -3.57%decrease; red down pointing triangle , a residential solar-power company based in California, is down this year as it is completely reliant on the U.S. market.
From The Wall Street Journal • May 19, 2026
It was a female, I decided, based on her small snout and narrow chest.
From "Willodeen" by Katherine Applegate
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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.