Domain Expansion

Domain Expansion is a phenomenon where words that are usually used in a specific “domain” of knowledge or expertise are then used in different contexts. For example, “feedback” was initially used as something returning back into a system. For instance, a telephone picking up audio from the speaker it was connected to. However, it soon expanded to be used as we do today - giving information back to someone about their performance.

In other cases, Domain Expansion can result from a business becoming so popular that it becomes synonymous with its product. For example, consider how Google has become a verb - “just google it” has become a common everyday phrase. Other words include Expo or Ziploc, which have been used to describe all whiteboard markers and plastic resealable bags.

One of the significant sources of domain expansion has been from the world of sports. “Slam Dunk” no longer just refers to the basketball shot but rather something regarded as guaranteed to occur that requires little additional effort. A “curveball” isn’t just an off-speed baseball pitch but can be used for anything unexpected hindering progress. Other examples include: “hit it out of the park,” “the ball is in your court,” “on the back foot,” “move the goalposts,” “par for the course,“ and “drop the ball.”

I wonder if there is research on why sports is such a good source of domain expansion, and if there is, could we predict what words will soon become used in everyday speech in the near future?