improvement
US /ɪmˈpruːv.mənt/
UK /ɪmˈpruːv.mənt/

1.
amélioration, progrès
the act or process of making something better or the state of being better
:
•
There has been a significant improvement in her health.
Il y a eu une amélioration significative de sa santé.
•
We are always looking for ways to make improvements to our services.
Nous cherchons toujours des moyens d'apporter des améliorations à nos services.