fully functional — works completely
collocationB2IELTS 5.5+neutraloccasional
Working perfectly and able to do everything it is supposed to do.
Say it like a native
Textbook The device is entirely operational.
Native It's fully functional.
'Entirely operational' is tech-manual stiff; 'fully functional' is the natural phrase.
Pattern: be + fully functional
In use
- The hospital's new X-ray machine is now fully functional.technology
- During my internship, I was responsible for making sure all the equipment in the lab was fully functional before each experiment.IELTS speaking
Common mistake
✗ The app is fully function now.
✓ The app is fully functional now.
'Functional' (adjective) — not 'function'.
Common collocations
fully functional— a, now, website, prototype
Don't confuse it
Not the same as 'partially functional,' which means only some parts work.