pleat pleat /ˈpliːt/

noun

1. () Any of various types of fold formed by doubling fabric back upon itself and then pressing or stitching into shape  ( plait , pleat )
   any of various types of fold formed by doubling fabric back upon itself and then pressing or stitching into shape
   
   

verb

1. Fold into pleats  ( pleat , plicate )
   fold into pleats
    Pleat the cloth
   Pleat the cloth
   
2. Pleat or gather into a ruffle  ( pleat , ruffle )
   pleat or gather into a ruffle
    Ruffle the curtain fabric
   ruffle the curtain fabric