1. the act or process of making something better
2. a change or addition that makes something better or more valuable

Examples

• The new software update is a significant improvement over the previous version.
• Her grades showed steady improvement throughout the semester.
• The home improvements increased the property’s value.
• We need to make improvements to our customer service.
• The improvement in air quality was noticeable after the new regulations.
• His improvement in math was remarkable after getting a tutor.
• The road improvements reduced traffic congestion considerably.