encaustic noun 2adjective 1forms 1 noun2 •A wax-based paint that is fixed in place by heating.It has become usual in discussions of Flags facture to use the terms, suggested by [Jasper] Johns himself, ‘encaustic', oil and collage on fabric’. — 1994 •A painting produced using this type of paint. adjective1 •Prepared by means of heat; burned in.After all, no sealant or finish is necessary in the encaustic medium, and shellac is stinky, caustic and messy. — 2019 formsencaustics