Definition

1. Adjective:
   • Having a specified base or center of operations: Used to indicate the primary location or headquarters from which something operates or is organized.
   • Founded on or derived from a particular principle, idea, or source: Used to describe something that is supported by or grounded in a specific foundation.

Usage and Examples

• Adjective:
  • The research is based on solid evidence. (The research is supported by and derived from solid evidence.)
  • She works for a London-based financial firm. (She works for a financial firm whose main offices and operations are in London.)
  • The film is based on a true story. (The film takes its origin and content from a true story.)

Advanced Usage and Nuances

• "-based" as a combining form: Often attached to a location or concept to form a compound adjective describing where something is primarily located or what it is fundamentally derived from.
  • The community-based program was very effective. (The program was organized and operated from within the community.)
  • It's a science-based approach to education. (The approach is founded on scientific principles.)

Variants and Related Words

• Base (noun): The bottom support; a fundamental principle; a center of operations.
  • The lamp has a heavy base.
• Base (verb): To establish, found, or use as a point from which to operate.
  • The company will base its new division in Singapore.
• Baseless (adjective): Without a foundation in fact.
  • The accusations were completely baseless.

Synonyms

• Centered: Having a central focus or location.
• Founded: Established on a particular basis.
• Grounded: Having a basis in something; well-founded.

Common Phrases and Collocations

• Based in: Having one's home or headquarters in a particular place.
  • The author is based in Canada.
• Based on: Using as a foundation, model, or source.
  • His decision was based on the available data.
• Work-based: Relating to or happening at a place of work.
  • She is completing a work-based training course.

Notes on Meaning

• The word "based" is rarely used in isolation as a standalone adjective (like in "the ice was based"). Its most common and natural use is in the constructions shown above (e.g., , ), where it functions adjectivally to describe the foundation or location of a noun.

Adjective

1. having a base of operations (often used as a combining form)
   • a locally based business
   • an Atlanta-based company
   • carrier-based planes
2. having a base
   • firmly based ice