functional
adj. C1 Advanced Oxford US //ˈfəŋkʃənəɫ// UK //fˈʌŋkʃənəl// func·tion·al
adj. designed to be useful or practical rather than attractive. It describes something that works well and does its job, even if it looks plain.
adj. designed for utility and efficiency rather than aesthetic appeal; capable of operating or functioning as intended.
The new office furniture is functional but not very stylish.
After the software update, the system is fully functional and all previous bugs are resolved.
The architect prioritised a functional layout that facilitated natural light and movement, arguing that a building's beauty should emerge from its utility.
From function + -al.
Usage
Often used to contrast with 'decorative' or 'ornamental'.