airbrush

Short definition from Wiktionary

Noun

1. 1
   A miniature, handheld paint sprayer, powered by compressed air or other gas, used for delicate, artistic painting, or sometimes retouching of photographs.

Verb

1. 1
   To paint using an airbrush.
2. 2
   To touch up or enhance a photograph or person, often with intent to mislead.
3. 3
   To edit or alter something in order to make it appear better.