carnetcar‧net /ˈkɑːneɪ $ ˈkɑːr-/ noun [countable] 
1British English a small book of tickets that you can use on trains, buses etc2an official document that allows you to go somewhere, especially to drive across the border into another country for a limited period
1British English a small book of tickets that you can use on trains, buses etc2an official document that allows you to go somewhere, especially to drive across the border into another country for a limited period