The phrase "concept has expanded" is correct and usable in written English.
You can use it when discussing the development or broadening of an idea or theory over time.
Example: "Over the years, the concept has expanded to include various perspectives that were previously overlooked."
Alternatives: "idea has grown" or "notion has evolved."
Since 1993, the concept has expanded to include environmental factors and explaining science to the public.
That concept has expanded to mean that a corporation should always be run to maximize the size of shareholders' claims.
But the concept has expanded to include points-based systems that allow buyers to divvy up their time into smaller segments, spread among a choice of resorts.
As the materiality concept has expanded to include sustainability considerations, many have overlooked the fact that nonfinancial materiality is both issue- and stakeholder-centric.
Today, the concept has expanded into contactless transport cards, identity cards, driving licences and the subscriber identity module (sim) used in mobile phones.
Over the years, this concept has expanded to complex phenotypes in higher organisms, including genetically engineered nematodes, Drosophila, zebra fish, or mice.
Many struggling food chains with faddish concepts have expanded too rapidly in recent years, including Cosi and Jamba Juice.
The use of multiple-choice tests designed to evaluate conceptual understanding and diagnose areas of difficulty in specific science disciplines (concept assessments or concept inventories) has expanded significantly in recent years.
But over the following decades, the concept of bullying has expanded in two directions.
Our concept of uremia has expanded to encompass the illness patients begin to suffer as glomerular filtration rate declines long before the onset of end-stage renal disease (ESRD) not explained by known derangements in volume status or metabolic parameters.
The new mechanical philosophy and, more generally, attention to the framework concept of "mechanism" has expanded rapidly over the last two decades bringing with it new orientations toward a wide range of issues in the philosophy of science.
