gatch noun 1verb 1forms 3 noun1 •A form of plaster of Paris formerly used in Persia. verb1 •To arrange (a patient's bed) so that its sections bend at the joints, to assist blood flow etc.If the bed is to be gatched, the board must be hinged, or two or more boards must be used with breaks correctly placed. — 1961 formsgatched · gatching · gatches