Definition of blown oil
1 : a thickened oil obtained by blowing a fatty oil (such as linseed oil or a fish oil) and used in paints and varnishes as a drying oil and in lubricants —called also oxidized oil — compare bodied oil
2 : a semisolid or solid substance (such as an asphalt) obtained by blowing fluid bitumens or residual oils from the distillation of petroleum and used in paints and protective coatings
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