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Reference : Phrasal Verbs : I : improve on

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improve on

Meaning: If something is improved on, it's made better than it was.

For example:

  • be improved on After the website was sold to a big media company, its design was improved on.

  • improve on sth The sales team is trying hard to improve on last year's sales figures.

Note: "improve upon" has the same meaning but is more formal

Quick Quiz:

The design of our packaging was improved on, so now it looks
  1. much better
  2. much worse
  3. about the same