/ ˌfʌŋkʃəˈnæləti; NAmE / noun ( pl. -ies )
1.
[ U ] the quality in sth of being very suitable for the purpose it was designed for
SYN practicality
2.
[ U ] the purpose that sth is designed for or expected to perform :
Manufacturing processes may be affected by the functionality of the product.
3.
[ U , C ] ( computing ) the range of functions that a computer or other electronic system can perform :
new software with additional functionality