based
Americanadjective
-
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.
-
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.
-
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.
-
having a specified origin or source (often used in combination).
They want to replace animal-based foods with plant-based milks and vegetable protein.
-
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.
The researchers examined patients who started GLP-1 based treatments between January 2021 and June 2024.
From Science Daily • May 19, 2026
Previously businesses told the BBC that this was because of the commercial landlord based in the UK charging high rents and not carrying out repairs.
From BBC • May 19, 2026
With the new outbreak largely concentrated in difficult-to-access areas, few samples have been laboratory-tested and figures are based mostly on suspected cases.
From Barron's • May 19, 2026
Medicare Part B income-related premiums were estimated based on the individual’s income.
From MarketWatch • May 19, 2026
“My brother Wes said they do a different routine based on what's inside them. The chicken ones are wild. The pork ones kind of lazy.”
From "The Marvellers" by Dhonielle Clayton
![]()
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.