Definition of sea mile in US English:

sea mile


  • A unit of distance equal to a minute of arc of a great circle and varying (because the earth is not a perfect sphere) between approximately 2,014 yards (1,842 meters) at the equator and 2,035 yards (1,861 meters) at the pole.

    Compare with nautical mile
    • ‘Shengsi is only 31 sea miles from Shanghai and visitors can go there by sea or by road.’
    • ‘Port Moresby on the island's southern coast was only 340 sea miles from Australia.’
    • ‘He said all boats were fishing on the borderline and were allowed to travel through the reserve which extends out three sea miles from the shore.’
    • ‘Rescuers said that the ship was hit by a strong storm some seven sea miles off the Daqin Island near Longkou, which might have caused the gas explosion.’
    • ‘It's ironic really that Omeath is closer to Warrenpoint than any other town, only one sea mile, but if you asked anybody if they knew anybody in Omeath and vice versa, the answer is usually few.’


sea mile

/ˈsē ˌmīl//ˈsi ˌmaɪl/