Synonyms of 'retouch'
touch upDictionary, finish, improve
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If you correct a problem, mistake, or fault, you do something which puts it right.
He may need surgery to correct the problem.
If something improves or if you improve it, it gets better.
He improved their house.
Thesaurus for retouch from the Collins English Thesaurus
If someone retouches something such as a picture or a photograph, they improve it, for example by painting over parts of it.