pinstripePronunciation: /ˈpɪnstrʌɪp/Translate pinstripe | into French | into German | into Italian | into Spanish Definition of pinstripe noun a very narrow stripe in cloth, especially of the type used for formal suits. a suit made of pinstripe cloth:a double-breasted navy pinstripeDerivatives pinstriped adjective pinstripe in other Oxford dictionaries Definition of pinstripe in the US English dictionary