based

[ beyst ]

adjective

1. 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.

2. 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.

3. 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.

4. having a specified origin or source (often used in combination):

   They want to replace animal-based foods with plant-based milks and vegetable protein.

5. 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

, Slang.

1. (used to express approval or respect, especially in response to a social media post):

   Based. At least somebody shows some spine on this forum.

verb

1. the simple past tense and past participle of base ¹( def ).

Other Words From

• un·based adjective
• well-based adjective

Word History and Origins

Origin of based¹

First recorded in 1610–20; base ¹( def ) + -ed ²( def )

Example Sentences

"Both of those theories are based on climate models, but we wanted to take a different approach based on observations of Venus' current atmospheric chemistry," said Constantinou.

From Science Daily

You also get to share knowledge and divide work based on each partner’s skill set, and the business is easy to set up and shut down.

From Salon

The Rivers Trust and Wildlife and Countryside Link has pointed out its analysis is based on a small sample size of data provided by the Environment Agency.

From BBC

For qualification for Euro 2025, all countries were split into three leagues based on their performance in the 2023-24 Nations League.

From BBC

But Nordsjaelland's background drew the former Ghana international to the team based in Farum, a small town in the east of Denmark.

From BBC