Definition of "pantdress"

Most deceptive pantdress is this deep-pleated one in bonded blue crepe from Stchli.

1967, Ebony, volume 23, number 1, page 165

Classic, box-pleated skimmers and pantdresses stay crisp and fresh, won't wrinkle or wilt!

1969, The New York Times Magazine (part 3)

Girls wore the pantdresses and culottes forbidden during school hours. Miniskirts and pantdresses “would have been unthinkable in this section of the country earlier,” a reporter observed.

2000, Ruth Rubinstein, Society's Child: Identity, Clothing, And Style, page 222