fourth class noun 2fourth-class adjective 1 noun2 •A (former) class of mail in the United States and Canada. •A class of rail travel formerly found in some countries. fourth-class adjective1 •(US) A former class of mail consisting mostly of heavier printed matter.Was it once stated that fourth class carriages no longer existed? But I have travelled fourth class in Jugoslavia and also on the C.F.A.E. in Algeria on the line from Oran to Colomb Bechar. — 1945
