Ved skib til transport af flydende naturgas (LNG-tankskib) forstås et lastskib, der er bygget eller tilpasset og anvendt til transport af flydende gasser i bulk, jf. definitionen i IGC-koden — Internationale regler for bygning og udrustning af skibe, der transporterer flydende gasser i bulk.
A Liquefied Natural Gas Carrier (LNG Carrier) is a cargo ship constructed or adapted and used for the carriage in bulk of liquefied natural gas as defined under the International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC) Code.