based
HighFormal to very informal, depending on context. The slang/internet usage is informal/colloquial.
Definition
Meaning
Established, rooted, or founded on a particular thing, place, or principle.
Having a solid foundation or justification; operating from a specific location; (slang, internet) expressing approval for someone's adherence to a principle or viewpoint.
Linguistics
Semantic Notes
The word is primarily the past participle of 'base', giving it an adjectival passive meaning ('being founded on'). Its modern slang usage is a separate, distinct development.
Dialectal Variation
British vs American Usage
Differences
No significant differences in formal use. The internet slang 'based' is equally common in online spaces of both varieties. Spelling and standard collocations are consistent.
Connotations
The slang usage 'based' is strongly associated with online, particularly youth and subcultural, discourse in both regions.
Frequency
High frequency in both formal and informal contexts. The slang use is extremely high-frequency in specific online communities.
Vocabulary
Collocations
Grammar
Valency Patterns
be based on + noun/noun phrasebe based in + locationbe based at + specific locationbase + object + on/upon + basisVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Based out of (colloquial for operating from a location).”
Usage
Context Usage
Business
Refers to a company's headquarters or primary location of operations, e.g., 'The tech firm is based in California.'
Academic
Used to describe theories, conclusions, or research that are supported by evidence, e.g., 'an argument based on empirical data.'
Everyday
Used to describe where someone lives or works, e.g., 'She's based in Manchester for now.'
Technical
In computing, refers to software architecture or data types, e.g., 'a cloud-based service', 'text-based interface.'
Examples
By Part of Speech
verb
British English
- They based the new policy on extensive consultations.
- The film is loosely based on a true story.
American English
- We based the character's design on an old photograph.
- The campaign's strategy was based on market research.
adjective
British English
- The London-based consultancy is expanding.
- This is a sound, evidence-based approach.
American English
- She works for a Boston-based biotech firm.
- The rule change was not fact-based.
Examples
By CEFR Level
- My company is based in New York.
- This story is based on real life.
- The manager made a decision based on the sales figures.
- They are a French-based company with offices worldwide.
- Her criticism was based upon a fundamental misunderstanding of the theory.
- The project's success was based on several key assumptions.
- The prosecution's case was entirely based on circumstantial evidence, which made it vulnerable to challenge.
- He runs a niche consultancy, home-based but operating with a global clientele.
Learning
Memory Aids
Mnemonic
Think of a BASE for a building. If a building is well BASED, it stands firm. A company BASED in Paris has its main BASE there.
Conceptual Metaphor
FOUNDATION IS SUPPORT/TRUTH (A theory based on facts is supported by them, as a house is supported by its foundation).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'базировать' in all contexts; 'located in' is often a better fit for physical location. The slang meaning has no direct equivalent.
Common Mistakes
- Confusing 'based on' with 'basis of' (e.g., 'The decision was based on the report' vs 'The basis of the decision was the report'). Using 'based off of' (considered non-standard; use 'based on').
Practice
Quiz
In its informal, internet slang usage, what does 'based' typically express?
FAQ
Frequently Asked Questions
While increasingly common in informal speech, 'based off of' is generally considered non-standard by style guides and in formal writing. The preferred preposition is 'based on' (or occasionally 'based upon').
'Based in' refers to a general area, city, or country (e.g., 'based in Germany'). 'Based at' refers to a specific, identifiable location like an office address, military base, or university campus (e.g., 'based at the Heathrow office').
It originated from the rapper Lil B (Brandon McCartney), who used 'based' to describe a lifestyle of positive individualism, free from societal constraints. It was later adopted and evolved in online communities to signify praise for someone holding a strong, often unconventional opinion without apology.
Yes, in both formal and informal contexts. Formally: 'a soundly based argument'. Informally (slang): 'His take on the issue was so based.' The meaning is entirely dependent on context.