The ability to perform a task or function; that set of functions that something is able or equipped to perform.
"The new software update significantly improved the app's functionality by adding support for offline mode and real-time collaboration."
In plain English: Functionality is how well something actually works for its intended purpose.
"The new software update improves the app's functionality by making it easier to share files."
Usage: Functionality refers specifically to the range of tasks or features that a system, product, or service can actually perform. Use this term when describing what something is capable of doing rather than its purpose or intended role.
Functionality is formed by adding the suffix "-ity" to the word "functional." This construction follows a standard pattern where the noun form denotes the quality or state of being functional.