a flat double pleat made by folding under the fabric on either side of it
box pleat in American English
a double pleat with the under edges folded toward each other
box pleat in American English
noun
a double pleat, with the material folded under at each side
Also called: box plait
Word origin
[1880–85]This word is first recorded in the period 1880–85. Other words that entered Englishat around the same time include: automatism, irredentist, jackpot, pari-mutuel, quotation mark