In centuries past (and in various modern art movements such as Photorealism) painters worked hard to eliminate or conceal any evident brushmarks or texture in a painting, blending and smoothing to hide all evidence of how the painting was created.
It doesn't meant the paint has to be thick or impasto, it can be thin. The style or approach just doesn't try to hide the fact that a brush or knife were used to create the artwork, it uses this to create an image that could only be done with paint (or art materials).
According to the Tate Gallery's Glossary the term painterly "carries the implication that the artist is reveling in the manipulation of the oil paint itself and making the fullest use of its sensuous properties."1
The close-up details in these Expressionist paintings, by Van Gogh and others, are examples of a painterly style. Other artists this term could be applied to include Rembrandt, Sargent, and Lucian Freud.
See Also:
- How to Paint in an Expressive or Painterly Style
- Art Worksheet: Apple Painted with Expressive Brush Strokes
References:
1. Glossary: Impasto, Tate, accessed 1 February 2007.

