p.pr. & ·vb.n. of flat.
2. flatting ·noun a method of preserving gilding unburnished, by touching with size.
3. flatting ·noun the process of forming metal into sheets by passing it between rolls.
4. flatting ·noun the process or operation of making flat, as a cylinder of glass by opening it out.
5. flatting ·noun a mode of painting,in which the paint, being mixed with turpentine, leaves the work without gloss.