the.com/usefulness
The quality of being invited back without being asked twice.
means The practical value something has because of how well it serves a purpose or need.
from Built from 'use' — from Latin 'usus,' meaning 'use, practice, employment,' tied to the verb 'uti,' 'to use' — plus the native English suffixes '-ful' (full of) and '-ness' (the state of). So, plainly, it means the state of being full of use: nothing hidden, nothing clever, just old Latin grit wearing an English work shirt.
- not the same as
- importance, which can be useless
- economics term
- utility, measured in imaginary units called utils
- paradox
- the most useful tools are often invisible
- expiry
- depends entirely on context, not the object