Amtrak
From Longman Dictionary of Contemporary EnglishAmtrakAm‧trak /ˈæmtræk/ trademark the company which runs passenger trains in the US Will you fly or take Amtrak? → ConrailFrom Longman Business DictionaryAmtrakAm‧trak /ˈæmtræk/ noun trademarkTRAVEL the national railway company in the US, responsible for operating passenger train services between important American cities