"additional functionality" refers to extra features or abilities that are added to something to make it perform tasks or provide services beyond its basic purpose or original capabilities. Full definition
Take advantage of additional functionality tailored to your real estate organization's needs, while still maintaining a cohesive user experience. (mrisoftware.com)
SaaS solutions allow firms to add additional functionality and modules as they grow and new needs arise. (cosmolex.com)
Reviewed and updated vendor's outdated functional requirements, and wrote new functional requirements for additional functionality developed by the internal IT team. (jobhero.com)