1. [verb] (transitive) To improve something (especially a photograph), by adding or correcting details, or by removing flaws.
2. [verb] (transitive) To colour the roots of hair to match hair previously coloured.
3. [verb] (archaeology) To modify a flint tool by making secondary flaking along the cutting edge.
4. [noun] The act of retouching.
5. [verb] Give retouches to (hair); 'retouch the roots'.
6. [verb] Alter so as to produce a more desirable appearance; 'This photograph has been retouched!'.
