noun
: a contract purchased from an advertising agency whereby a card of a type suitable for bus, subway, or train advertising is required to be placed in half of the cars in a specified district
noun
: a contract purchased from an advertising agency whereby a card of a type suitable for bus, subway, or train advertising is required to be placed in half of the cars in a specified district
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012