fanfold adjective 1noun 1verb 1forms 3 adjective1 •Having the shape of fan or concertina, with a row of sheets alternately folded backwards and forwards.The problem appears to have started when a guide wire became hung up on one of the long hinges that join the fanfold panels of the array. — 2007 noun1 •A document folded in this manner. verb1 •To fold in this manner.When the top sheet, blanket, and bedspread of a closed bed are turned back, or fanfolded, the closed bed becomes an open bed, or a bed ready to receive a patient or resident. — 2005 formsfanfolded · fanfolding · fanfolds