functionality

noun ! Definition from Wiktionary (CC BY-SA). More about functionality at Wordnik → Where our words come from →

1. The ability to do a task, performance, or execution; a set of functions that something is able or equipped to perform.
2. In trademark law, the tendency of a product design to serve a function other than the identification of the product, preventing that design from being protected as a trademark.
3. The presence of a functional group.