diapery adjective 1noun 1forms 3 adjective1 •(US, informal) Resembling or characteristic of a diaper (type of undergarment).[…] his baggy, wrinkled suit emanating a diapery stench […] — 2015 noun1 •Fabric with a diaper pattern.[…] diaperies of white damask and purple velvet […] — 1844 formsdiaperies · more diapery · most diapery