pincushion Syllabification: (pin·cush·ion)Pronunciation: /ˈpinˌko͝oSHən/Translate pincushion | into German | into Italian | into Spanish Definition of pincushion noun a small cushion into which pins are stuck for convenient storage. (also pincushion distortion) a form of optical distortion in which straight lines along the edge of a screen or a lens bulge toward the center. pincushion in other Oxford dictionaries Definition of pincushion in the British & World English dictionary