long haulDefinition of long haul noun a long distance (in reference to the transport of goods or passengers): [as modifier]:a long-haul flight a prolonged and difficult effort or task:implementing the White Paper is likely to be a long haulPhrases over the long haul chiefly North American over an extended period of time: would the American people support such a costly war over the long haul?long haul in other Oxford dictionaries Definition of long haul in the US English dictionary