/ ˈpɪnstraɪp; NAmE / noun
1.
[ C ] one of the white vertical lines printed on dark cloth that is used especially for making business suits
2.
[ U , C ] dark cloth with white vertical lines printed on it; a suit made from this cloth :
a pinstripe suit
► pin·striped adjective [ only before noun ]:
a pinstriped suit
a pinstriped official (= who is wearing a pinstriped suit)