Improvement

n.hopeful, capableeveryday

Meaning 1

A change or result that makes something better than it was.

Reach for it when identifying concrete progress that can be compared with an earlier state

The quieter motor is a meaningful improvement for staff working beside the lift.

everyday
gain
a measurable benefit or increase should be concise
not when Gain often needs a named metric and can feel transactional.
professional
advance
a field or project has moved beyond a prior limit
not when Advance can describe position or timing without better quality.
professional
enhancement
an added feature raises usefulness or appeal
not when Enhancement sounds optional where the change fixes an essential problem.
formal
refinement
a small precise change polishes an already good result
not when Refinement is too slight for a transformative improvement.

The gradual process of becoming more capable or healthy.

Reach for it when recognizing development that is still underway

His improvement in reading aloud became clear by the end of term.

playful
breakthrough
a sudden major improvement crosses a stubborn barrier
not when Breakthrough exaggerates steady, incremental progress.
everyday
progress
forward development matters more than one particular change
not when Progress may be real without a discrete improvement to point to.
warm
recovery
health or performance is returning after a setback
not when Recovery looks backward to a former level rather than beyond it.

marked improvement
A marked improvement followed the switch to shorter practice sessions.
room for improvement
The prototype works, but there is room for improvement in the latch.
continuous improvement
Continuous improvement became part of the workshop's weekly routine.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.